Abstract: The equilibriums between titanium compounds and titanium in hot metal saturated with carbon were investigated by oversaturation precipitation method.Experimental results showed that titanium contents balanced with Ti (C, N) in hot metal were much less than that with TiC, and the solubility of titanium was in approximately linearly direct proportion to temperature, whereas inversely proportional to nitrogen partial pressure.There were much titanium precipitates in the bottom and side surface of crucible whereas less in inside and surface layer of hot metal by SEM analysis of experimental iron samples, which show that titanium compounds were precipitated by heterogeneous nucleation crystals and that graphitic refractory were more in favor of heterogeneous nucleation than other materials.