Boron doped diamond films have been deposited on Ti substrates by CVD. Raman spectroscopy reveals the presence of small amounts of nondiamond carbon. According to SEM;ind XRD, the diamond Rims polycrystalline with preferential [112] crystallite orientation. Electrochemical measurements show that Fe(CN)(6)(3-/4-) couple behaves in a quasi-reversible manner at the Ti/Diamond electrode. The main reason of the successful preparation of the Ti/Diamond electrode is the formation of an conductive TIC interlayer between the Ti substrate and the diamond coating.