This study aims to determine the effect of the Stir-Squeeze Casting process with pressure variations of 3 tons, 6 tons, and 9 tons on the mechanical properties and micro characteristics of 6063 aluminum composites. The Stir-Squeeze Casting process is carried out to homogenize the alloy, reduce porosity, and improve the quality of the castings. The tests conducted included Brinell hardness testi…