The high-temperature nitriding behavior of six Fe-28Mn-7.5Al-0.65C (wt%) base alloys with different aluminum, chromium, and titanium contents was studied in the temperature range of 850℃~1000℃ at 1 atm pressure in a pure nitrogen atmosphere. The nitriding kinetics followed the parabolic rate law in all case due to the inward diffusion of nitrogen. Kinetic analysis of nitriding was employed to investigate the effect of alloying Ti in alloys. The activities energy for nitriding of alloys were also explored.