An electrochemical study of anodic film growth on titanium in oxygenated at temperatures from 200° to 257°C and at constant potential, below the evolution potential is presented. At constant applied potential, it is assumed that the voltage drop across the oxide is constant and the field , where is the film thickness. The results are interpreted in terms of a rate expression derived by Dignam (20–22) and assume the effective field, , assisting the ionic conduction process is the local field, for , where is the dielectric constant of the oxide and δ is a geometric factor having a value the order of unity.