a second sheet of aluminum 18 that are joined by a weld 17 the twb 12 might be created by fusion welding e g laser arc etc or by friction stir welding and typically a butt joint is utilized for illustrative purposes fig1 depicts a weld 17 that joins the first sheet 16 and the second sheet 18 although fig1 depicts twb 12 having only the first sheet 16 and the second sheet in other embodiments the twb 12 includes more than two different sheets and includes as many sheets as are desired to form a part the twb might be used for various purposes and in one embodiment the twb 12 is stamped into a part for a motor vehicle for instance the twb might be stamped into a a b pillar a rocker a roof rail a cross car beam a door inner and the like in one embodiment it is desirable for the part into which the twb 12 is stamped to have portions or regions with different characteristics for instance it might be desirable for a front portion of a door inner that supports door hinging to be stronger than other regions of the door inner as such in one embodiment the first sheet 16 and the second sheet 18 are both aluminum.