Abstract: The total oxygen content and inclusions in Ti-bearing austenitic stainless steel with different silicon content wereinvestigated through the coupling of thermodynamics calculation and experimental results. The results showed that the total oxygen content，the inclusion number and size decreased throughout the process. The types of inclusions at the end of AOD stagewere mainly CaO-SiO2-Al2O3-MgO，and the types of inclusions before Ti addition in LF refining processwere mainly CaO-Al2O3-MgO-SiO2.The inclusions after Ti addition in LF refining processwere mainly CaO-Al2O3-MgO-TiOx.The results calculated by FactSage software were in good agreement with those obtained by experiment.The heats with higher silicon content had lower total oxygen contentand lower titanium content in CaO-Al2O3-MgO-TiOx inclusions compared with the heats with lower silicon content when the other conditions were almost same.

Key words: Ti-bearing austenitic stainless steel, silicon content, inclusion, total oxygen content, thermodynamics calculation