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The TiN coatings were deposited onto the low carbon steel substrates with different temperatures (150,250,350 and 450 ℃), using hollow cathode discharge (HCD) ion plating method. The measurements of the microhardness and wear resistance of the coatings show that the hardness value slowly increases and the wear resistance remains almost unchanged with increasing the substrate temperature from 150 ℃ to 450 ℃. The reason for effect of the substrate temperature on the properties and morphologies of the coatings was investigated by means of X-ray diffraction and scanning electron microscope (SEM).