Nowadays the of the reduction of CO2 emissions and the decrease in energy consumption are the aims for different industries around the world. In order to satisfy increasingly restrictive regulations, the automobile industry is constantly looking for innovative techniques to produce lighter automobiles, more efficient and less polluting. One of the latest technologies designed, and still developing, is that of Tailor Welded Blanks. TWBs are combination of multiple metal sheets with various thicknesses and/or strengths welded together using high speed weld along their edges. Over the years, the advantages of using aluminium in this technology have been discovered, thanks to its low density, high corrosion resistance, and good weldability.