TiC(x)-layers have been deposited onto hardmetals by means of thermal CVD using different hydrocarbons (methane, n-heptane, cyclohexane, benzene, ethylbenzene, xylene). The deposition process, layer growth and structure properties (texture, substructure) remarkably depend on hydrocarbons used. Correlations have been obtained between the thermal stability of the hydrocarbons, deposition behaviour, deposition rate and structure properties of the layers. Conclusions are drawn for practical applications of the results.