NOVELTY - Dilute copper alloy material comprises, based on a total mass of the dilute copper alloy material, 2-12 mass ppm of sulfur, 2-30 mass ppm of oxygen, 4-55 mass ppm of titanium, and a balance of pure copper and an inevitable impurity.    USE - The dilute copper alloy material is useful as dilute copper alloy wire, dilute copper alloy twisted wire, solder-plated composite wire, and cables such as coaxial cable and composite cable (all claimed).    ADVANTAGE - The dilute copper alloy material has high productivity and has excellent conductivity, softening temperature, and surface quality.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) a dilute copper alloy wire comprising: (a) the dilute copper alloy material; (b) a conductivity not less than 102%, preferably not less than 98% International Annealed Copper Standard (IACS); and (c) a softening temperature of 130-148 degrees C when the diameter is 2.6 mm;    (2) a dilute copper alloy twisted wire comprising the dilute copper alloy wires twisted together;    (3) a cable comprising the dilute copper alloy wire and an insulating layer formed on the dilute copper alloy wire;    (4) a coaxial cable comprising: (a) a central conductor comprising the dilute copper alloy wires twisted together; (b) an insulation cover on an outer periphery of the central conductor; (c) an outer conductor comprising copper or copper alloy on an outer periphery of the insulation cover; and (d) a jacket layer on an outer periphery of the outer conductor;    (5) a composite cable comprising: (a) the cables arranged in a shield layer; and (b) a sheath on an outer periphery of the shield layer;    (6) a method of manufacturing a dilute copper alloy wire comprising: (a) forming molten metal by melting the dilute copper alloy material by South Continuous Rod (SCR) continuous casting and rolling at a casting temperature of not less than 1100-1320 degrees C; (b) making a wire rod at a working ratio of 90% (corresponding to 30 mm in diameter) to 99.8% (corresponding to 5 mm in diameter); and (c) making a dilute copper alloy wire by hot-rolling the wire rod;    (7) a method of manufacturing a dilute copper alloy member comprising: (a) forming a wire rod from the dilute copper alloy material by twin-roll continuous casting and rolling and Properzi type continuous casting and rolling at a casting temperature of not less than 1100 degrees C nor more than 1320 degrees C; and (b) hot-rolling the wire rod, where the hot-rolling is conducted so that temperature is not more than 880 degrees C at an initial roll and not less than 550 degrees C at a final roll; and    (8) a solder-plated composite wire for a solar cell manufactured by using the dilute copper alloy wire.