Fusion bonding of Ti Ti, Fe Fe and Ti/Fe Ti/Fe butt-welded joints through vanadium filler metal wasinvestigated. Tungsten inert gas (TIG) welding method was employed. The microstructures of the weldedjoints were analyzed by means of scanning electron microscopy (SEM), energy dispersive spectroscopy(EDS) and X-ray diffraction (XRD). Mechanical properties of the joints were evaluated by microhardnesstests and tensile tests. Vanadium exhibited good bonding with adjacent materials in Ti-Ti and Fe-Fewelded joints. Continuous solid solutions were observed in both Ti-Ti and Fe-Fe joints. Ti-V-Ti and Fe-V-Fe welds exhibited the average tensile strength of 416 MPa and 434 MPa, respectively. Vanadium,ER50-6 and ERTi-1 filler metals were applied to join Ti/Fe bimetallic sheet. Serious cracks were observedin the joint. XRD pattern of the fractured surface confirmed the Fe2Ti and sigma intermetallics. The regionsdominated by Fe-Ti compounds exhibited high hardness values (∼1112HV0.01). Cracks initiated andpropagated in regions rich in Fe-Ti and sigma intermetallic phases. The magnitude and distribution of weldingresidual stresses were estimated by finite element method. The peak Von Mises stresses (Ti-V-Ti, 501 MPa;Fe-V-Fe, 555 MPa) occurred in the base metals near V welds. The brittle intermetallics and high thermalinduced stresses resulted in the cracking in Ti/Fe-Ti/Fe welded joint.