6061Al matrix composites reinforced by 5vol.%ABOw and 15vol.%SiCp were fabricated by semi-solid stirring technique successfully at 640 ℃ for 40min with the stirring rate of 300 rpm,and the composites were extruded at a temperature of 500 ℃ using an extrusion ratio of 25:1 subsequently.Tensile tests were performed on as-casted and as-extruded(ABOw+SiCp)/6061Al composites at room temperature,and microstructures were observed by scanning electron microscope(SEM).SEM investigation showed that the as-extruded composite exhibited reduced porosity as well as a more uniform distribution of the reinforcements compared with the as-casted composite.The tensile tests results showed that the ultimate tensile strength and tensile elongation of as-extruded composite are higher than that of as-casted composite. 6061Al matrix composites reinforced by 5vol.% ABOw and 15vol.% SiCp were fabricated by semi-solid stirring technique successfully at 640 ° C for 40min with the stirring rate of 300 rpm, and the composites were extruded at a temperature of 500 ° C using an extrusion ratio of 25: 1 followed. Tensile tests were performed on as-casted and as-extruded (ABOw + SiCp) / 6061Al composites at room temperature, and microstructures were observed by scanning electron microscope (SEM) extruded composite exhibited reduced porosity as well as a more uniform distribution of the reinforcements compared with the as-casted composite. tensile test results showed that the ultimate tensile strength and tensile elongation of as-extruded composite are higher than that of as-casted composite .