... →Crushing→Melting→Forging→Slab billet→Hot rolling→Cold rolling→Titanium strip 3.CompositionDesignationBasis % Impurity content % (≤) TaNbFeSiNiWMoTiNbOCHN gr1Allowance-0.0050.0050.0020 ... copper:Tu2,Tu3,sheet,bar,tube² Titanium,nickel,zirconium,chromium standard parts:DIN7991,7984,6921,915.