The piston is thought to be a standout amongst the most essential parts in a reciprocating engine, reciprocating pumps, gas blowers and pneumatic barrels, among other comparable mechanisms. As most critical part, is that less time is required to outline the cylinder and simply a couple of essential details of the engine. Actually, due to high heat transfer through the piston, the outer shape of the piston crown will be deformed. So due to this problem here computational testing has been performed on ANSYS simulation software with three different materials and observed that stress of piston with ALSI AI alloy has maximum stress of $50.79 Mpa$ piston made of M-124 cast AL composite stress value is $50.54 Mpa$. Furthermore, maximum stress on M-124 forged AL alloy is found to be $50.23 Mpa$ and here observe that in case of deformation, piston made of ALSI AI alloy found to have maximum deformation of $1.06 mm$ and when piston made of M-124 cast AL combination then maximum deformation is $0.88 mm$. What's more, maximum deformation on M-124 forged AL alloy is found to be $0.086 mm$ and here observe that in case of heat flux, piston made of ALSI AI alloy is found to have maximum heat transfer of $3.3 w/mm^2$ is observed. When piston made of M-124 cast AL combination then maximum heat transfer of $3.4 w//mm^2$ and maximum heat flux on M-124 forged AL alloy is found to be $3.6 w/mm^2$. So the aluminium alloy M-124 is the best manufactured composite material So this material is suggested for manufacturing work.