Proton exchange membrane water electrolyzer (PEMWE) is a new generation of clean and efficient hydrogen production device. Bipolar plate is one of its key components. To improve the corrosion resistance of Titanium (Ti) as bipolar plate, Titanium Nitride (TiN) film was prepared on the surface of industrial TA1 by magnetron reactive sputtering (MRS) and pulse laser deposition (PLD) technologies, and the films prepared under different process parameters were evaluated. The results show that dense and complete TiN films can be obtained on Ti surface under different preparation processes, and the corrosion current density of Ti substrate is significantly increased. However, the composition of the film prepared by magnetron reactive sputtering is affected by the oxygen competition reaction, and its homogeneity is inferior to that of the film prepared by pulse laser deposition. The comprehensive performance of the PLD-prepared film is more excellent in terms of low corrosion current (0.025 μA.cm_?2^{), moderate} corrosion overpotential (?0.106 V), and good hydrophobicity.