Abstract: The effects of the deposition temperature on the chemical vapor deposition (CVD) rate, the bulk hardness value of TiN deposite and the hardness and the dimension of the steel base were investigated. TiN film obtained at temperatures between 950 and 1000℃, were stoichiometric composition, golden-yellow in color, and the high hardness (Hv₁≈2000N/mm²). The hardness and dimension of the steel base depend on the deposition temperature. The variety of dimension for the steel base is less than 0.0005 if it is tempered after deposition.