In this work, a titanium nitride (TiN) coating applied with the oblique-angle DC-magnetron sputtering technique was systematically studied using designed experiments. The TiN layer was applied on an upper hook, which is a machine component of a fishing-net weaving machine. The goal was to investigate the influence of sputtering process factors on the deposition rate and to find appropriate operating conditions for statistically significant factors in order to improve the thin-film manufacturing process, raising the quality of the TiN coating. Five process factors including the oblique angle, rotational speed, sputtering DC current, operating pressure and Ar to N2 flow-rate ratio were simultaneously investigated using the 2 5-1 fractional factorial design method. A normal probability plot of effects, and main and interaction-effect plots of the process factors were constructed in order to identify the significant process factors and the appropriate operating conditions. The main factors including the oblique angle, sputtering DC current, operating pressure, gas-mixing ratio, interactions between the oblique angle and sputtering DC current, and interactions between the oblique angle and gas-mixing ratio were found to be statistically significant process factors. Moreover, the appropriate operating conditions for the significant process factors were obtained with the graphical method.