A composite material (also called a composition material or shortened to composite, which is the common name) is a material made from two or more constituent materials with significantly different physical or chemical properties that, when combined, produce a material with characteristics different from the individual components. The individual components remain separate and distinct within the finished structure, differentiating composites from mixtures and solid solutions.The new material may be preferred for many reasons:

common examples include materials which are stronger, lighter, or less expensive when compared to traditional materials.

More recently, researchers have also begun to actively include sensing, actuation, computation and communication into composites, which are known as Robotic Materials.Typical engineered composite materials include:

Reinforced concrete and masonry

Composite wood such as plywood

Reinforced plastics, such as fibre-reinforced polymer or fiberglass

Ceramic matrix composites (composite ceramic and metal matrices)

Metal matrix composites

and other Advanced composite materialsComposite materials are generally used for buildings, bridges, and structures such as boat hulls, swimming pool panels, racing car bodies, shower stalls, bathtubs, storage tanks, imitation granite and cultured marble sinks and countertops.

The most advanced examples perform routinely on spacecraft and aircraft in demanding environments.