Yes very important, wheels on car are spun on very hard steel die's not aluminum, the properties of the two metals are very different, one is soft, and the other is hard, (the wearing-out of the metals with extended use). In addition, how materials interact with each other as in coexistence and enhancement. Many things swell and shrink with heat and cold, linen is easier to sew then fleese, patternmakers must take in all factors concerning the product they are working with.