In order to solve the scaling and weight reduction problems of proton exchange membrane fuel cells, the conductive and corrosion resistant coating can be prepared on the surface of the thin metal plate is substituted for the traditional thick and heavy graphite plate. However, the carbon coating prepared by magnetron sputtering has amorphous structure, which is not conducive to the improvement of the conductivity and corrosion resistance of the coating. Therefore, the purpose of this study is to improve the electrical conductivity and corrosion resistance of the amorphous carbon coating by doping metal Ti nanocrystals in an appropriate amount. In the experiment, magnetron sputtering system and self-developed high-frequency oscillating pulsed electric field were used to prepare several groups of carbon coatings containing different Ti doping amounts, and the effect of Ti nanocrystals on the electrical conductivity and corrosion resistance of amorphous carbon coatings was studied. The experimental results show that with the Ti target current increasing from 0.35 A to 0.7 A, the doping amount of Ti in the coating increases, the Ti atom ratio reaches 8.20%, and the carbon coating changes from amorphous structure to Ti nanocrystalline/amorphous carbon composite structure. On the other hand, the experimental results show that proper doping of Ti is beneficial to improve the density, conductivity, hydrophobicity and corrosion resistance of the coating.