This study aims at researching mechanical properties of TIC welding which has been used for magnesium welding and friction stir welding; this is a new method for magnesium welding. It particularly focuses on analysing of bending fatigue test among other mechanical properties. Joints made through TIG and FSW welding for magnesium applications in automotive and aeronautical-astronautical industries are exposed to various mechanical stresses and in particular to dynamic loads when vehicles are in motion. Fracture has been observed in welding areas due to such dynamic loads. This analysis mainly concentrates on the differences between these two welding methods: TIC and FSW welding, and on determining the method with superior advantages due to the fact that TIG welding has been intensely used for magnesium welding, and friction stir welding is a new application in terms of magnesium welding.