Drastic improvement in elongation and impact toughness of Ti–Al–V–Mo–Zr alloy tube via three-step heat treatment

•Extruded Ti–Al–V–Mo–Zr alloy tube was subjected to three-step thermal treatment.•Improved elongation and impact toughness were achieved.•Heat treatment and microstructure improved impact toughness. The limited ductility and impact toughness of titanium alloys is a critical issue that limits the use of titanium alloys in the oil and gas industry. In this study, we obtained the highest impact toughness (55.7 J/cm2) for an extruded Ti–Al–V–Mo–Zr alloy tube using a three-step heat treatment. The microstructure and corresponding mechanical properties of the Ti–Al–V–Mo–Zr alloy tube were studied. We achieved significantly improved elongation (69%) and impact toughness (51%) of the Ti–Al–V–Mo–Zr alloy, contribute to the mixing coarse equiaxed and lamellar microstructure. The special heat treatment and bending lamellar microstructures play an important role in this significant phenomenon.