This project deals with the determination of best material among the three selected ones. Initially, based on systematic literature review, three materials, i.e. aluminium 4032, grey cast iron and titanium 6Al-6V, were selected, and their properties were determined. Then, design specifications form YAMAHA FZV3 was taken, and required design parameters and necessary dimensions of the piston were calculated. After this, the piston's Design was performed using SOLIDWORKS 2016, followed by structural and thermal analysis using ANSYS 16.0. Finally, the results were compared and it was noticed that among three materials the highest deformation was seen for aluminum which was 31.77% more than titanium alloy while the maximum difference in stress was for grey cast iron with 39.7% more than titanium alloy. Also, the heat flux for titanium alloy was least. This indicated that titanium 6Ai-4V gave better for durability and structural and theoretical performance. Hence, it was concluded to be the best material among the selected ones for the piston used. تفاصيل المقالة