<p>The current study focuses on the stir casting method’s ability to produce AA6063 hybrid (graphite and silicon nitride) composites incorporated with 4 weight% (wt%) of graphite (Gr) and variable wt% of silicon nitride (Si₃N₄) microparticles. The wt% of Si₃N₄ such as 3 wt%, 6 wt%, 9 wt% and 12 wt% were used. The microstructural behavior and mechanical characteristics of various developed AA6063 hybrid composites such as tensile strength, percentage elongation and microhardness, were assessed. The dispersion pattern of Si₃N₄ and Gr microparticles in the AA6063 hybrid matrix was observed using scanning electron micrographs. It was found that the mechanical characteristics, such as microhardness and tensile strength, were enhanced at the expense of a decrease in percentage elongation with the addition of Gr and Si₃N₄. The hybrid composite AA6063, including 4 wt% Gr and 9 wt% Si₃N₄, exhibited the highest tensile strength. Whereas the hybrid composite AA6063, including 4 wt% Gr and 12 wt% Si₃N₄, exhibited the highest microhardness.</p>