The Al 7075 alloy matrix materials possess mechanical properties with the addition of SiC particulates as reinforcement. Liquid Metallurgy method is adopted for preparing composite workpiece. composites were adopted for heat treatment process by subjecting to solutionizing followed by quenching in water media for improving the mechanical properties. Then the specimens are adapted to artificial aging at a temperature of 130˚C for different time duration. The hardness properties are examined for the composite materials before and after heat treatment. It is seen that Al 7075 composite under heat treatment conditions reveals increase hardness.