In this paper, we investigated the titanium silicide (TiSi) film having ultra low sheet resistance property. To improve the sheet resistance of TiSi film, the TiN capping layer and two steps thermal treatment were introduced. TiN capping layer prevented the impurity, such as oxygen and carbon, in the ambient during the rapid thermal anneal (RTA) process. Moreover, two steps RTA process can be improved the sheet resistance of TiSi film because of changing of the TiSi phase. Lastly, the initial Ti thickness was strongly depends on the sheet resistance of TiSi. This is because the initial Ti thickness affect the TiSi composition and thickness.