wo kinds of austenitic stainless steel sheet samples with three kinds of thickness are welded by TIG welding,the mechanical properties and microstructure of the weld joints are investigated. By visual inspection, there is no defect on the weld samples surface. All weld samples fracture at the base mental,while the strength and hardness of welded joint of 0Cr18Ni9 weld sample are higher than those of 1Cr18Ni9Ti weld sample,and the hardness distribution of 0Cr18Ni9 is more homogeneous. Owning to fine and homogeneous vermicular ferrite in joint microstructure,the mechanical properties of 0Cr18Ni9 is better than that of 1Cr18Ni9Ti whose joint microstructure contains coarse ferrite and austenitic.