The microstructure and tensile properties of TC17 alloy fabricated by electron beam wire deposition (EBWD) were investigated. The as-built EBWD TC17 alloy exhibited a homogeneous element distribution

and the coarse columnar β grains grew epitaxially through many deposited layers along the z direction. Inside each columnar grain there was fine basket-waved microstructure. After hot isostatic pressing (HIP)

small α rods formed in the β matrix. In the solution treated and aged material

rod-like α phase and fine α precipitates both existed. The tensile strength and elongation of as-built EBWD TC17 alloy were 935MPa and 9.0%

respectively. The tensile strength and elongation after HIP were 904MPa and 18.0%. After solution treating and aging

the tensile strength increased 18% (to 1066MPa) compare with the HIP condition due to the strengthening effect of fine α precipitates. However

the elongation decreased significantly (to 7.5%) and the ductile dimples on the tensile fracture surface also decreased.