Friction Welding is prominent to be one of the foremost welding processes for similar and dissimilar metals. Previously, the process has been modeled utilizing the rudimentary techniques of constant friction and slip-stick friction. The motivation behind this article is to present the use of a new characteristic for temperature profile estimation in modeling of Rotary Friction Welding Process. For the first time, a unified model for the similar and dissimilar materials has been exhibited, with an implementation of phase transformation of the materials. The model was generated on COMSOL, thermal and structural modules were used to plot the temperature curve. The curve for welding of
dissimilar metals was analyzed with that of practical curves already acquired and then the effect of varying parameters on the welding of similar metals was studied.