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The processing variables considerably affect the mechanical properties of P/M aluminium-based composites. A proper combination of mixing, degassing and consolidation is needed. In particular, the temperatures during consolidation are very important. In this research the hot extrusion of silicon carbide particulate reinforced aluminium P/M alloys corresponding to types AA2014, and AA6061 is being studied. The influence of mixing, degassing and hot pressing variables on the properties of the extruded product has been investigated using microstructural analysis and tensile testing. The results indicate that wet mixing in a high-speed impeller is adequate for achieving homogeneous distribution at a low content of SiC particulates. Increasing the hot extrusion temperature increases the strength initially but starts to reduce it when the temperature is too far above the solidus. Hot pressing before extrusion gives better tensile properties compared to bars extruded without hot pressing.