Special features of heat treatment of sheets for large welded panels of alloy VT20

Welding of preforms of titanium alloys Muses deformation and the formation of cold cracks under the action of welding stresses. The residual stresses which appear in other operations in manufacturing structures (forging, mech anical treatment, etc,) in combination with welding stresses cause a still greater warping and deformation leading to failure of the structures. The p resent paper concerns the processes of relaxation, laws of gas saturation, and changes in the mechanical properties in heat treatment of titanium allo y VT20.