The welding technolgy and key points for controlling weld quality concerning titanium-steel composite plate of internal steel barrel shell in 210 m chimney of third-phase project in Zhenjiang Power Plant have been presented.It is believed that the important condition for ensuring weld quality of titanium is strengthening the tightness of sticked titanium tape

the cleanness of basic material and welded material

as well as the inert gas shielding of melten pool in welding etc..The non-destructive examination of welded joints on titanium-steel composite plate in the chimney of third-phase project in the power plant had 99.9% percent of pass for once.Practice shows the said welding technology to be feasible.