To overcome the detrimental effect of residual stress in welded joints. which affects the overall performance of the welded structure. this paper studies the magnitude and distribution of residual stress after welding and local post-weld heat treatment (PWHT). The coupled thermo-metallurgical-mechanical model for welding 6 mm thick Ti-6Al-4V (TC4) titanium alloy plates was established. https://jalyttlers.shop/product-category/grinder/