The invention discloses a
welding method of a heterogeneous
titanium alloy T-shaped joint, which comprises the following steps of: 1,
processing a to-be-welded part of a rib plate into a K-shaped groove, and fixing the K-shaped groove on a
welding tool clamp; 2, adopting coaxial
powder feeding type
laser cladding, wherein lasers act on the to-be-welded area on the two sides of the T-shaped connector correspondingly, an MIG
welding gun swinging periodically is arranged on the rear side of a
laser beam, and the included angle between the MIG welding gun and the rib plate and the included angle between the
laser beam and the rib plate are adjusted to be located on the same plane; 3, setting
welding process parameters; and 4, introducing
shielding gas in advance, conducting double-face laser cladding composite
electric arc welding of the T-shaped connector, conducting synchronous different-direction welding on welding heat sources on the two sides, wherein electric arcs swing periodically, single-pass welding forming of the workpiece is achieved, and the
shielding gas is continuously introduced for cooling after welding. The laser cladding
powder is used for regulating and controlling configuration, the internal consistency of the welding seam is enhanced, the welding seam strength is improved, and cracks are restrained through components of the welding wire before solidification of a
molten pool.