: In recent years, demand is rising for lighter and stiffer automobile bodies to meet stricter environmental and safety regulations. The laser Tailor Welded Blank in which the laser processing technology is used to join sheet metal of different thicknesses, material properties and surfaces status in one work piece before stamping process has been considered as a suitable solution to achieve this target in automobile industry. Therefore, TWB is applied not only for simple, but also to very complicated automobile parts. In this study numerical and experimental investigation of maximum achievable draw depth and weld line movements in a TWB which consist of two work pieces of same thickness, but different material properties for a circular cup have been studied. In this study, TWBs with different type of strength combination, E335D ST12 and thickness of 1.2 mm, made by the laser welding process were used in deep drawing process with a 100 mm punch. Also computer analysis has been carried out with the model designed as the same as the specimens ignoring anisotropy of sheet metals. The model including die, punch, Tailor Welded Blank and blank holder, was modeled in ABAQUS/CAE and solved in ABAQUS/Explicit and the results are displayed in ABAQUS/Viewer post-processor. The following conclusions were drawn as a result of the study. Maximum achievable drawing depth in TWB is related to the ?, ? such that, it will increases when ? increases and ? 0.7. If ? increases, we expect a linear relationship between drawing depth and ?. Weld line moves during the process. Maximum of dislocation occurs just before failure in the middle of the weld line. This movement was measured and it was found that it relates extremely to ? and ? in addition to blank geometry and forming process. When ? 0.7, ? 0.5 failure occurs earlier and maximum weld line movement will reduce when ? is increased.
