Composite material is defined as combination of two or more materials and to prepare and measure the characteristics of in detail about material. It can be classified into three types one is Metal matrix composite, Polymer matrix, Ceramic matrix composite. The present book is on metal matrix composite "The present book deals with the preparation and mechanical characterization of Aluminium 7075 metal matrix reinforced with silicon carbide and graphite. Silicon carbide and graphite can be considered in different percentages like (2+3), (4+3) and (6+3). By using these materials to prepare and investigate the Mechanical characteristics like Ultimate tensile strength, Breaking strength, Rockwell hardness, Brinell hardness, Compression strength and toughness." Aluminium Metal Matrix Composites (AMMC) have various properties which makes it to be applicable into various places like automobile, military industries, aerospace, building constructions and others due to light weight, thermal properties, stiffness, high mechanical strength corrosion resistance. During the analysis of the composite matrix of aluminum, the properties / characteristic was investigated.