Aluminum matrix nano composites have become of great interest in the lightweight fields because of their high specific stiffness and high specific strength. Many processing techniques have been developed to manufacture metal matrix nano composites on the commercial scale. Compocasting is a relatively new technology for composite forming, different from the conventional composite shaping technologies that use either solid or liquid metals as the starting material. An investigation is carried out on the influence of applied load, sliding speed, wearing surface hardness, reinforcement fracture toughness and morphology as the critical parameters in relation to the wear regime. In general, EMS composites offer superior wear as compared to the SC irrespective of applied load and sliding speed.