Titanium is widely used in manufacture of stainless steel due to its stabilizing of carbon and nitrogen, pinning effect on grain growth and strengthening effect, which is contributed by formation of Ti(C,N) with different compositions, size and distribution. However, complex inclusions can be formed after Ti addition in metallurgy process. And those inclusions make complex effects on continuous casting, surface quality of stainless steel plate and stainless steel tensile properties. In this paper, the authors discussed and concluded the investigation development of Ti-bearing stainless steel. Firstly, oxides with high melting point including Al2O3, spinel, (MgO-Al2O3)rich-CaO-TiOx generally cause the clogging of submerged entry nozzle in Ti-bearing stainless steel. Optimized addition of Al, Ca, Ti and control of slag can decrease the amount of oxides with high melting point. Secondly, TiN and complex TiN inclusions precipitate and grow up during cooling and solidification of titanium stabilized stainless steel, which can collide and aggregate to form TiN clusters. And macro oxides can promote the formation of TiN clusters. However, TiN or complex TiN inclusions can also work as heterogeneous nuclei for δ-Fe during solidification of stainless steel, and promote the generation of equiaxed fine-grain structure. In addition to forming compounds, titanium can present as solid solution state in steel. and promote formation of ferrite in austenitic stainless steel or increase ferrite fraction in duplex stainless steel with its strong ferrite forming ability, which is beneficial to the improvement of mechanical properties of stainless steel casting.