Laser Powder Bed FusionLaser Powder Bed Fusion (L-PBF) is a widely used additive manufacturingAdditive manufacturing technique that enables the creation of complex latticeLattice structures with many applications including biomedical implants and aerospace components. This study investigates the microstructuralMicrostructural features, compression behaviour, and failure modes of Ti6Al4VTi6Al4V (Ti64Ti64) with a Body-Centred Cubic (BCC) latticeLattice structures fabricated using continuous wave (CW) L-PBF with relative densitiesRelative density ranging between 10 and 77%. The two key factors that are explored includes the effect of relative densityRelative density and the effect of heat treatment. Results indicate that the strength and Young's modulus of the latticeLattice structures increase with higher relative densitiesRelative density and smaller unit cell sizes, although the rate of improvement diminishes as the densityDensity approaches that of a solid material. When comparing as-built and heat-treated samples, heat-treated samples exhibited enhanced plastic deformation, and demonstrating increased ductility compared to the as-built samples, attributed to the microstructuralMicrostructural changes from α’ → α + β. Fractographic analysis of the compressively deformed samples revealed a mixed fracture characteristic with shear fracture being the predominant one due to the nature of the structure of the latticeLattice. The dominant brittle fracture characteristics in the as-built samples, and the ductile failure in case of the heat treated samples were noted.