Thin-walled components of titanium alloy are under the advantages of lightweight and compact structure.However,due to the geometric characteristics of large axial dimensions,thin-wall thickness and complex shapes,traditional forming techniques has a long and complicated process when forming thin-walled components,which severely limited the application of thin-walled parts. The 3 D printing technology can quickly manufacture the complex specialshaped components. The forming capabilities of selective electron beam melting( SEBM) and selective laser melting( SLM) and the microstructure,mechanical properties and surface roughness of titanium alloy thin-walled components were reviewed. The development trend of precision and complex integral thin-walled components of titanium alloy made by 3 D printing was analyzed,providing reference for the application of lightweight titanium alloy thin-walled components in high-end equipment.