Aluminum–alumina particulate composites are a class of metal matrix composites which have high strength-to-weight ratio and low density. The most important mechanical property in industries is the fatigue behaviour. Hence, it is important to know more about mechanical properties of these composites. In this study, composite samples containing of different weight percent of 1%, 2%, 3% Al 2 O 3 particles in size of 206m were fabricated by stir casting method, extruded by reduction area of 1:20 and heat treated by T6 condition. Microstructure of these composite materials was characterized by using scanning electron microscopy (SEM). Then Hardness, tensile and fatigue properties of these composites were investigated. It is observed that by increasing in weight percent of Al 2 O 3 , the hardness, tensile strength and fatigue strength more increased.

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