The present invention provides a high strength + titanium alloy
pipe not requiring a large amount of cutting and enabling full use to be made of
the features of titanium alloy of light weight and high strength and a method for
production of the same. Specifically, a high strength + titanium
alloy pipe having an outside diameter of at least 150 mm and a wall thickness of
at least 6 mm, the + titanium alloy pipe characterized by having
a welded seam running in the longitudinal direction of pipe at one location and
by having a ratio of the minimum wall thickness to the maximum wall thickness of
the portions excluding the weld zone of 0.95 to 0.99. Also, a method of production
of a high strength + titanium alloy pipe comprising cold forming
a high strength + titanium alloy plate of a wall thickness of at
least 6 mm into a tubular shape by the U-O method or press-bending method and welding
together the abutted plate edges.
