The Al alloy matrix materials exhibiting excellent mechanical properties with the addition of B4C particulates as reinforcement. Stir cast method is preferred for preparing composite specimen materials. Then the composites were prepared for heat treatment process by subjecting to solutionizing followed by quenching in different media for improving the mechanical and physical properties. Further, all the specimens are subjected to artificial aging at a temperature of 130˚C for different time duration. The hardness properties are examined. Due to excellent increase in the hardness the material removal rate decreases. It is also observed that Al hybrid metal matrix composite experimented under identical heat treatment conditions reveal significant enhancement in hardness.