Full-field strain measurements within and around a particular grain in polycrystalline pure titanium were made on a sample subjected to incremental tensile loading. Using digital image correlation, we measured the plastic strain distribution after progressively applying a plastic strain of 0.25%, 0.5%, 1.75% and, 4%. The full-field strain measurements reveal a uniform strain distribution up to an overall plastic strain of 0.5%. For larger applied strains, the measurements indicate that grain boundaries sustained significantly lager deformations than the grain interior. Additionally, plastic strains were found largest along grain boundary regions perpendicular to the loading axis. Post deformation optical microscopy reveals the presence of surface micro-cracks responsible for the deformation localization along the grain boundaries.