In this paper, the effect of Ti doping on the phase stability of α″-Fe16N2 was investigated. Experimental results show that appropriate Ti addition may benefit the α″-Fe16N2 phase formation. Theoretical calculation shows that the formation enthalpy of α″-(Fe,Ti)16N2 phase in (Fe,Ti)-N films is smaller than that of α″-Fe16N2 phase in Fe-N system. This suggests that the stability of α″-Fe16N2 can be enhanced by Ti addition. Therefore, the α″ alloy phase and exhibit high saturation magnetization μ0Ms=2.3—2.6T．