Composite materials with an aluminium matrix and ceramic reinforcement are becoming more popular in Industrial application. The addition of AlN reinforcement increases the hardness of aluminium 7075 composite. In the current study, stir casting method was used to manufacture aluminium 7075-AlN composites by increasing the weight of AlN particles from 0 to 10 percent by a step of 2 weight percent. The composite matrix and As-cast alloy underwent a solutionized treatment for two hours with a temperature of 470° C, which was followed by extinguishing in different media such as air, water, and ice. Then the specimens are subject to artificial ageing at 120° C. Microstructure analysis and hardness test were carried out on both as cast and Al7075-AlN metal matrix composites. Al7075-AlN MMC’s shows the improvement in hardness when compared with Al7075 alloy.