(1) Polymer composites mainly refer to fiber reinforced polymer materials. For example, carbon fiber is embedded in epoxy resin to increase the strength of composite materials, which can be used to manufacture tennis rackets, golf clubs and sledges. Glass fiber composite material is a composite of glass fiber and polyester, which can be used to make structural materials, such as some parts in automobiles and aircraft, structural materials of bridge body and hull, etc. Its strength can be compared with steel. The reinforced polyimide resin can be used to make plastic engines for automobiles, reducing the engine mass and saving fuel.

(2) In order to change the brittleness of ceramics, graphite or polymer fibers are embedded in ceramics, and the composites made of ceramic matrix composites have certain toughness and are not easy to break. It can also be used at extremely high temperatures. These ceramic matrix composites are expected to become new structural materials for automobiles and rocket engines. The metal mesh ceramic matrix material has super rigidity and can be used as the material of bulletproof clothing.

(3) Metal matrix composite coating on metal surface can protect metal surface or endow metal surface with some special function, such as metal surface coating can resist corrosion; The metal surface can be used as an enamel lining to make a chemical reaction kettle; Chromium plating on metal surface can make the surface bright; The metal surface is coated with polymer elastomer to give the surface toughness, which can be used as anti-cavitation material on the stainless steel blades of hydraulic turbines and steam turbines to extend their service life; Composite multilayer materials with special functions on pure silicon chips can be used for computer integrated circuit chips. In recent years, the specific strength of aluminum-boron fiber is twice that of aluminum alloy.