What Is Materials Science?

Last verified: October 3, 2026. Materials science is the interdisciplinary field that studies how the structure of a material, from its atoms up to its visible grain pattern, determines its properties, and how the way a material is made and processed determines that structure. It draws on physics, chemistry and engineering, and it is the reason a steel beam, a silicon chip, a ceramic turbine coating, a polymer film and a bone implant can each be designed on purpose rather than found by accident. Where the field is taught alongside engineering, it is usually called materials science and engineering (MSE), and the two names are used almost interchangeably in funding and academic settings.

What materials science actually studies

The organizing idea of the discipline is that four things are linked: processing (how a material is synthesized, shaped and heat-treated), structure (its composition, crystal structure, defects and microstructure), properties (mechanical, electrical, thermal, optical, magnetic, chemical) and performance (how it behaves in a real application). Textbooks and university programs commonly draw these four as the corners of a “materials tetrahedron”: change the processing and the structure changes, which changes the properties, which changes performance. A materials scientist is someone who can reason around that loop in either direction, either predicting what a given process will produce or working backward from a desired property to a process and composition that might deliver it.

That framing is what separates materials science from its neighbors. Physics asks why matter behaves as it does at a fundamental level (see CASRAI’s guide on what physics is); chemistry asks how substances are composed and transformed (see what chemistry is); engineering asks how to build useful things (see what engineering is). Materials science sits across all three and is defined by its focus on the structure-property relationship in condensed matter, meaning solids and soft matter, rather than by any single set of tools.

The main classes of materials

The field is conventionally divided by material class. The boundaries are blurry and many of the most interesting systems cross them, but the four-way split is the standard starting point:

• Metals and alloys — steels, aluminum, titanium and nickel alloys, and the processing (casting, rolling, heat treatment, welding) that controls their strength, ductility and corrosion behavior.
• Ceramics and glasses — inorganic, typically brittle, high-temperature-tolerant materials, from structural ceramics and glass to piezoelectrics and ionic conductors.
• Polymers — plastics, elastomers and fibers built from long molecular chains, whose behavior depends on chain length, architecture and how the chains pack or entangle.
• Composites — engineered combinations of two or more phases, such as fiber-reinforced polymers, in which the combination performs differently from either component alone.

Cutting across these classes are functional and emerging categories: electronic and photonic materials (semiconductors, dielectrics, optical materials), magnetic materials, energy materials (battery electrodes, solid electrolytes, photovoltaics, catalysts), biomaterials, and nanomaterials, whose properties change as feature sizes shrink to the nanometer scale. CASRAI covers the last of these separately in its guide on what nanotechnology is, and the laboratory-safety side in nanomaterial safety in the research laboratory.

Major subfields and research areas

• Physical metallurgy and structural materials — phase transformations, deformation, fatigue, fracture and corrosion in metals and alloys.
• Ceramic science — processing, sintering and properties of ceramics and glasses.
• Polymer science and engineering — synthesis, rheology and solid-state behavior of polymers and soft matter, including self-assembling systems.
• Electronic, photonic and magnetic materials — semiconductors, thin films, quantum materials and the materials underlying devices.
• Energy and sustainability materials — materials for batteries, fuel cells, solar cells, catalysis, hydrogen storage and recyclability.
• Biomaterials — materials that interact with biological systems, such as implants, scaffolds and drug-delivery carriers; this overlaps with biomedical engineering.
• Surface science and tribology — coatings, adhesion, friction and wear at interfaces.
• Computational materials science — modeling and simulation, increasingly combined with data-driven methods, to predict materials behavior before synthesis.
• Crystallography and mineral materials — the geometry of atomic arrangements and its relationship to properties, covered more fully in CASRAI’s guides on crystallography and mineralogy.

Methods and tools

Materials research combines making things, looking at them, testing them and modeling them. Most projects use all four.

Synthesis and processing

Methods range from melting and casting, powder metallurgy and sintering to thin-film deposition, solution-based chemical synthesis, polymerization, crystal growth and additive manufacturing (3D printing). The research question is usually how a processing parameter such as temperature, cooling rate, atmosphere or pressure changes the resulting structure.

Structural and chemical characterization

Characterization is the core experimental activity of the field. Commonly used techniques include X-ray diffraction (crystal structure and phase identification), optical and scanning electron microscopy (microstructure), transmission electron microscopy (atomic-scale structure and defects), atomic force microscopy (surface topography and local properties), Raman and other forms of spectroscopy (bonding and composition), energy-dispersive X-ray analysis (elemental composition) and thermal analysis (phase changes and stability). Many of the most capable instruments are too large or costly for a single lab and are shared, which matters for research administration (see below).

Property testing

Mechanical testing (tension, compression, hardness, fatigue, fracture), electrical and magnetic measurements, thermal conductivity, optical measurements and corrosion testing connect structure to the properties and performance in the tetrahedron.

Computation and data

Computational methods span electronic-structure calculations, molecular dynamics, thermodynamic modeling and continuum simulation, and a growing body of work applies machine learning to materials data. The U.S. Materials Genome Initiative (MGI), whose partner agencies include NSF, DOE, NIST, NASA, DARPA, NIH and others, states its aim as discovering, manufacturing and deploying advanced materials twice as fast and at a fraction of the cost of traditional methods, and it has made shared data, models and infrastructure a policy priority. That emphasis is why data standards and repositories are part of the field today; see CASRAI’s comparison of NOMAD and the Materials Data Facility, and the dictionary entries for the FAIR data principles and computational reproducibility.

A short history

People have been practicing materials science, without the name, for millennia: the conventional names for ages of human history, Stone, Bronze and Iron, are named for materials. The scientific footing came later. In the late nineteenth century Josiah Willard Gibbs showed that the thermodynamic properties of the phases of a material relate to its atomic structure and physical properties, which gave metallurgy and ceramics a shared theoretical basis. The field began to be recognized as a distinct discipline from about the 1940s, and in the United States its growth was accelerated in the early 1960s when the Advanced Research Projects Agency funded a series of university-hosted interdisciplinary laboratories to expand basic research and training in the materials sciences. Departments that had been separate, such as metallurgy and ceramics, were progressively merged into broader materials science and engineering departments, and polymers, electronic materials and later biomaterials and nanomaterials were added to the scope.

Careers and education

Undergraduate programs are generally titled materials science and engineering (some institutions use “materials engineering” or “metallurgical engineering”), and many researchers also arrive from physics, chemistry or another engineering field. Research careers typically require a PhD, followed in many cases by a postdoctoral position, then work in a university, a national laboratory or an industrial R&D group in sectors such as semiconductors, aerospace, energy storage, medical devices and manufacturing. Roles around the science include characterization facility managers and staff scientists, who run shared instruments for other researchers. Because the field is hands-on and instrument-heavy, graduate training often includes extensive time at shared user facilities as well as the home lab.

Who funds materials research

Materials science in the United States is supported mainly by federal agencies, with substantial industry funding for applied work.

• National Science Foundation (NSF). NSF’s Directorate for Mathematical and Physical Sciences lists materials research programs including Biomaterials, Ceramics, Condensed Matter and Materials Theory, Condensed Matter Physics, Electronic and Photonic Materials, Metals and Metallic Nanostructures, Polymers, and Solid State and Materials Chemistry. It also supports the cross-agency Designing Materials to Revolutionize and Engineer Our Future (DMREF) program and the Materials Research Science and Engineering Centers (MRSEC), which fund large interdisciplinary center-scale teams.
• Department of Energy (DOE). The Office of Science’s Basic Energy Sciences program includes a Materials Sciences and Engineering Division supporting basic research on the discovery and design of new materials with novel properties and functions. It also funds Energy Frontier Research Centers and operates a national network of scientific user facilities, including large X-ray light sources, neutron scattering centers and nanoscale science research centers, used each year by tens of thousands of scientists from universities, industry and government laboratories.
• Department of Defense and other mission agencies. Defense-related agencies fund structural, electronic and protective materials; see CASRAI’s guide to the DOD research funding landscape. NASA, NIST, NIH and others fund materials work tied to their missions, and several are partners in the MGI.
• Industry and private partners. Applied materials development, such as batteries, alloys and semiconductors, is frequently funded through sponsored research agreements and industry consortia.

Outside the United States, comparable support comes from national research councils and international programs; the specific programs differ by country and are not covered here.

Key societies and journals

Professional societies in the field include the Materials Research Society (MRS), TMS (The Minerals, Metals & Materials Society), ASM International and the American Ceramic Society, and the field is also served by physics, chemistry and engineering societies with materials divisions. Prominent journals include Advanced Materials, Nature Materials, Acta Materialia, the Journal of Materials Research and MRS Bulletin. For journal metrics context, see the dictionary entry on the Advanced Materials impact factor. Publishing norms in the field, including data and code availability, are set by individual journals, so authors should check each journal’s current policy.

How materials science connects to research administration

Materials research has several features that make it distinctive from an administrative point of view.

• Shared instrumentation and user facilities. Because key characterization tools are expensive, access is commonly through institutional core facilities with recharge rates, or through competitive proposals to national user facilities. Budgets and effort need to account for facility fees and travel, and facility-access proposals are a separate workflow from the grant itself.
• Data management. Funders increasingly expect a plan for sharing data; see the dictionary entry on data management plans. Materials data is often heterogeneous (spectra, images, simulation outputs), which is why domain repositories and metadata standards matter.
• Export controls and security. Advanced materials such as high-performance alloys, composites and semiconductors can be subject to export regulations and security review, particularly where defense funding or foreign collaborators are involved. See the dictionary entry on export-controlled research.
• Intellectual property and technology transfer. New compositions and processes are frequently patentable, and federally funded inventions fall under the framework described in the Bayh-Dole Act entry. Industry partnerships typically require sponsored-research and materials-transfer agreements.
• Laboratory safety. Powders, nanomaterials, solvents, high-temperature furnaces and cryogens bring specific hazards; see the nanomaterial safety guide linked above.

For how materials science sits next to other disciplines, see the sibling explainers on mechanical engineering (which relies on materials selection and mechanics of materials), chemical engineering, civil engineering and electrical engineering, and the broader map in CASRAI’s overview of the branches of science.

Frequently asked questions

What is the difference between materials science and materials engineering?

Materials science emphasizes understanding the relationships among processing, structure and properties, while materials engineering emphasizes applying that understanding to select, design and manufacture materials for a purpose. In practice the two are taught and funded together, which is why the combined name materials science and engineering is common.

Is materials science physics or chemistry?

Both, and neither exclusively. It uses physics to explain electronic, magnetic and mechanical behavior and chemistry to synthesize and understand bonding and composition, and adds engineering concerns of processing and performance. Many researchers move between departments, which is reflected in how funding programs are organized.

What are the four main classes of materials?

Metals, ceramics, polymers and composites. Semiconductors, biomaterials and nanomaterials are often treated as additional categories that cut across these.

What is the materials tetrahedron?

It is a diagram connecting processing, structure, properties and performance, used to show that the four are interdependent and that changing one affects the others.

What does a materials scientist do?

A materials scientist makes, characterizes, tests or models materials to develop new ones or understand why existing ones behave as they do, working in universities, national laboratories and industry.

Who funds materials science research?

In the United States, primarily NSF, DOE and defense agencies, plus NIST, NASA, NIH and industry partners. See the funding section above for specific programs.

How is materials science related to nanotechnology?

Nanotechnology works with materials at the nanometer scale, so much of it is materials science; the reverse is not true, since most materials research concerns bulk and microscale structure as well. See what nanotechnology is.