CF PEEK is becoming more frequently used in orthopaedics and traumatology due to its favourable characteristics despite poor bone ongrowth to the implants. Modifying the surface of the implant can expand the indications to include situations where good bone ongrowth is required. In this study Ti VPS coating was successful in modifying the surface to improve bone ongrowth to CF PEEK screws. It appeared that the thickness of the Ti VPS coating was correlated to the density of the C fibres in the implant, and that the coating was less adherent to the exposed PEEK. This may be important for the design of CF PEEK implants in which coating may be considered.