 This study investigated the effect of heat treatment processes on the dry sliding wear resistance of the TC-21T alloy at different levels of normal load and sliding speed. Results showed that specimens subjected to water quenching and aging, WQ-plus aging, under extreme load and speed conditions, 50nm and 3m per second, possessed the poorest wear resistance despite having the highest hardness. Meanwhile, those left in the annealed condition revealed the highest wear resistance despite having much lower hardness than the other conditions. A mathematical polynomial model for wear resistance expressed in wear rate was developed, validated, and used to obtain optimal parameters. This article was authored by Ali Abdelmanin, Ramadan N. Elshar, M. Elshanoui, and others.