Single and hybrid Al matrix composites with 2%Mg2B2O5w/6061Al,2%Gr/6061Al,2%SiCp/6061Al,2%Mg2B2O5w+2%Gr/6061Al, 2%Mg2B2O5w+2%SiCp/6061Al, 2%Mg2B2O5w+2%Gr+2%SiCp/6061Al reinforcements were prepared by powder hot extrusion process, and the wear resistance and the friction behaviour of the single and hybrid Al matrix composites were studied. The results show that the wear rates of all kinds of the composites increase with the load increasing, the wear rate of Al matrix composites increase with the addition of graphite, the friction coefficients of all kinds of the composites decrease with the load increasing and then become stabilized, the friction coefficient is between 0.22 to 0.32. Abrasive wear and slight adhesive wear dominate the wear mechanism of Al matrix composites without graphite, after the addition of graphite, the wear mechanism of Al matrix composites converts into serious adhesive wear.
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