The present investigation involved the application of the friction stir technique (FSP) on copper metal matrix composites (CMCs) that were reinforced with cerium oxide nanoparticles. The CMCs possess a range of advantageous attributes, including their mobility, power, potential for expansion, and inherent intelligence. The research also focuses on the optimization of parameters for friction stir processed surface composites (FSP-ed) utilizing the Taguchi method. This study examined the ideal combination of process parameters and its subsequent impact on hardness and tensile strength, eventually resulting in the optimal solution. The material has been shown to possess an optimum tensile strength of 440 MPa and hardness of 104.043 VHN. The optimal parameters for the experiment were determined to be a rotation speed of 1100 revolutions per minute (rpm), a transverse speed of 30 mm per minute (mm/min), and a total of 3 passes in each direction.