The invention relates to a method for manufacturing pure
titanium seamless tubes. The method is characterized by comprising the following steps of: preparing tube blank bars;
machining the tube blank bars; diagonally rolling and
punching holes: heating blank to 700 to 980 DEG C,
punching holes once or twice by utilizing a two-roll diagonally
rolling mill group, wherein
molybdenum mandrels or water-cooled mandrels are utilized, the inclined angle of
punching roll is 8 degrees, the number of revolutions of the roll is 40 to 90 basic speed to 195 r / min; preparing the pierced billet after punching hole, wherein the specifications of the pierced billet are that the outside
diameter is phi 72 to phi 125mm,the wall thickness is 5 to 20mm, and the length is; carrying out cold rolling; and carrying out heat treatment on finished product, detecting performance and entering warehouse. The invention has the characteristics of high production efficiency, low production cost, high material yield, short production period, low device investment, better product quality, and the like. The produced pure
titanium seamless tubes have good quality, the mechanical properties accord with state requirements, and the pure
titanium seamless tubes can meet the need for large-scale industrial production.