Hydroxyapatite (HA) coatings for bone implants are known to enhance the osteogenesis and durability of prosthesis due to their chemical compatibility with bone. The integrity and continuity of the HA-coated implants is strongly influenced by the adhesion of the coating to the substrate. The objective of the current work was to investigate the damage mechanisms of HA coatings, deposited onto Titanium alloy TA6V using a plasma spray operating at low energy (LEPS). Tensile tests were performed for this purpose. The tensile specimens were observed during the tests using two synchronized cameras, specifically designed for Digital Image Correlation. The first camera was focused on the edge of the sample, while the second was focused on the face of the sample. This allowed us to perform an accurate observation of the damage mechanisms of the coating. The observations showed that a large decohesion of the coating occurred before any visible cracking. A two-dimensional plane-strain finite element model was developed to simulate the coating delamination occurring during tensile test. The simulation helped us to better understand the delamination mechanisms and process and to evaluate the critical interfacial energy.