CPC C22C 9/00 (2013.01) [C21D 9/02 (2013.01); C22F 1/08 (2013.01); G03B 3/10 (2013.01)] | 8 Claims |
1. A titanium copper foil comprising from 1.5% by mass to 5.0% by mass of Ti, the balance being Cu and inevitable impurities, wherein in a Ti concentration curve obtained by analyzing a cross section parallel to a rolling direction along a thickness direction by STEM-EDX, a lower concentration Ti layer having a Ti concentration less than an average value of Ti concentrations in the Ti concentration curve and a higher concentration Ti layer having a Ti concentration equal to or higher than the average value of the Ti concentrations in the Ti concentration curve are alternately present in a thickness direction, and wherein the titanium copper foil satisfies 1.0% by mass≤HH≤30% by mass, and HH/HL≥1.1, in which HH and HL are as defined in the present specification.
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