When a hydroxyapatite (HAP) coated implant is surface charged, the early stages of osteointegration are accelerated. Adding a piezoelectric material to the coating, such as biocompatible barium titanate (BT), can help to increase surface charges and contribute to a faster patient recovery. HAp and HAp/BT coatings were deposited on Ti-6Al-4V alloy substrates using CoBlastTM. To compare between materials, coatings were charged by DC contact polarization or by corona discharge at high temperature. Thermally stimulated discharge currents (TSDC) and surface potential measurements were performed.