Composite materials represent the avant-garde of the technologies of materials combining the best features of multiple materials. The composition of multiple materials guarantees very high physical, mechanical and thermal performances.
Composite materials consist of two or more phases. The properties and performance of composite materials are superior to the sum of those of the constituent materials. The phases are called "reinforcement" and "matrix" and they are respectively a more rigid and strong phase and a less rigid and less dense phase.
The properties of composite materials depend on the properties of constituent materials, their geometry and their distribution.