The welded joints of high-strength titanium alloys, produced using arc welding, have, as a rule, unsatisfactory values of mechanical properties, especially those of ductility in the as-welded state as compared to the base metal. In the work the effect of thermal welding cycle, type of filler metal and the post-weld heat treatment on the structure and properties of welded joints of two-phase high-alloyed titanium alloys having σ t > 1000 MPa, were evaluated. The properties and structure of

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... joints of high-strength titanium alloys VT23, T110 and experimental alloy Ti-6.5A1-3Mo-2.5V-4Nb-1Cr-1Fe-2.5Zr, made by argon arc welding applying the filler wires, differing by their composition from the base metal, were studied. It is rational to produce the joints of complex-alloyed titanium alloy Ti-6.5A1-3Mo-2.5V-4Nb-1Cr-1Fe-2.5Zr using argon arc welding applying filler wire VT1-00sv at modes, providing the through penetration and the content of wire components in the weld metal at level of 10 % in combination with the subsequent high-temperature annealing. 6 Ref., 1 Table, 6 Figures. K e y w o r d s : titanium alloys, argon arc welding, filler wire, properties, structure