Ti alloy and alluminum material

Patent Pending PROBLEM TO BE SOLVED: To provide a method for producing a high strength solid phase joined body of a titanium alloy and pure aluminum or an aluminum alloy having high purity. ; SOLUTION: An [alpha]+[beta] type titanium alloy in which, as a structure before joining, a fine and equiaxed [alpha]+[beta] two phase structure is formed, and, for effectively creating fine ruggedness on the surface layer by pickling, containing one or more selected from molybdenum, niobium and tantalum as a [beta] stabilization type element(s) having excellent corrosion resistance by 2 to 10% in total and having an [alpha] phase volume ratio of 30 to 70% is used, and is heated to a temperature which is >=300[deg.]C and less than the liquid phase point of the aluminum material as a joining temperature.