Composites are usually formed to create new materials
with enhanced physical, mechanical or working properties. For
example they may be formed to create light, strong materials (good
strength to weight ratio) or materials that are both shock
and temperature resistant.
Many composites are made up of just two materials. One material
called the matrix or binder surrounds and binds
together a cluster of fibres of a much stronger material called
the reinforcement. In the case of mud bricks the mud became
the matrix and the straw became the reinforcement.
Tyres are good example of composite materials. Modern tyres are
constructed of layers, which may include rayon cloth, steel
bands and nylon belts all set in a matrix (binder)