Aluminium SiC composites are promising in frictional and breaking material applications because of its tribological properties. The current work concentrates on optimization of stir casting parameters such as stirring speed, pouring temperature and stirrer blade design, and their outcome on mechanical behaviour of Al/SiC composite prepared by stir casting. The optimization technique used is Taguchi grey relational analysis. A Taguchi L9 orthogonal array was designed and experiments were conducted based on the designed parameters. The ultimate tensile strength and hardness values were tested for every composite. Derived on the average outputs evaluated from Taguchi optimized Grey Relational Analysis, a stirring speed of 700 RPM, pouring temperature at 670 ºC and alternate stirring blade design were predicted to be the optimized factors. An Analysis of Variance was performed to recognize the controlling factors. The pouring temperature was identified to hold the leading major control of 75.19% on the mechanical properties of the composite. Confirmation test carried with the optimal factors identified an enhancement of 52.85% in Grey Relational Grade. Microstructure examination of Al/SiC composite of the confirmation trial exhibited SiC particle reinforcement in the Al matrix

Keywords: Aluminium SiC Composite, stir casting, Taguchi, grey relational analysis, ANOVA