Hydroxyapatite (HA) mimics the behavior of natural bone, and provides a strong, long-lasting adhesive interface between a bone replacement implant and the surrounding tissue. HA is not commonly used in practice for large weight-bearing implants because studies suggest that delamination of the hydroxyapatite film may lead to implant wear and loosening. Furthermore, the hydroxyapatite coating also acts only as a temporary barrier to ion release from the bulk biomaterial. We developed a diamondlike carbon (DLC)/HA bilayer. The underlying titanium substrate is first coated with DLC using pulsed laser deposition (PLD). The DLC surface is then coated with HA to form the final bilayer material. The films were characterized using SEM, TEM, XRD, Raman spectroscopy, and mechanical testing. The DLC/nanocrystalline HA bilayer model is potentially useful for many implant designs.