Copper alloy wire, copper alloy stranded wire, coated electric wire, wire harness, and method for producing copper alloy wire

A method for producing a copper alloy wire for use as a conductor of an automotive electric wire, the method comprising the steps of:

• forming a cast material comprising in mass percent Fe:
• 0.4% or more and 2.5% or less, Ti:
• 0.01% or more and 1.0% or less, one or more selected from the group consisting of Mg, Sn, Ag, Ni, In, Zn, Cr, Al and P:
• 0.01% or more and 2.0% or less in total, and the balance being Cu and unavoidable impurities, wherein an O content is 20 ppm or less;
• forming a wrought product by subjecting the cast material to plastic working;
• forming a drawn wire by subjecting the wrought product to wire drawing;
• and
• subjecting the drawn wire to heat treatment so that the drawn wire has a tensile strength of 450 MPa or more and an elongation of 5% or more.