Tensile　properties　and　microhardness　of　electron　beam　welded　thick　damage-tolerant　Ti-6Al-4V　joints　with　the　weld　cross-section　of　parallel　shaped　and　taper　shaped　configurations　were　examined.　Moreover,　the　mechanical　heterogeneity　along　the　weld　depth　was　studied.　The　results　indicate　that　for　both　the　shaped　joints,　the　weld　metal　exhibits　increased　strength　and　microhardness,　while　decreased　ductility　and　toughness　as　compared　with　the　base　metal.　The　mechanical　properties　of　the　weld　metal　are　heterogeneous　along　the　weld　depth.　With　the　increase　of　weld　depth,　the　strength　and　microhardness　increase.　The　weld　middle　position　has　smaller　mechanical　heterogeneity　than　the　weld　top　and　weld　root.　Moreover,　the　heterogeneity　of　parallel　shaped　welds　along　the　weld　depth　is　lower　than　that　of　taper　shaped　welds.　It　is　also　found　that　the　change　of　mechanical　properties　such　as　strength　and　microhardness　has　microstructure　dependent　trend.　The　mechanical　heterogeneity　along　the　weld　depth　is　dependent　on　the　grain　size　change　of　beta　phase　and　martensite.　(C)　2012　Elsevier　B.V.　All　rights　reserved.