Potentiostatic anodization of large size titanium electrodes (> 200 cm(2)) has been modeled and validated. During the process, with the development and growth of the TiO2 nanotubes (TiO2-NTs) layer there is a variation in the resistance of the system. A time-dependent model for this parameter is implemented looking for fitting the experimental data of current density with the simulation results. Finally, and more importantly, the model allows obtaining the distribution of oxidized titanium mass in the surface of the electrode. Although in this case the geometry of the anodized titanium plate is quite simple, the same procedure can be applied for the anodization of more complicated electrodes. Consequently, it is possible to evaluate whether the distribution of TiO2 structures with the electrochemical anodization procedure is adequate or not without carrying out the expensive and time-consuming experimental research stage. (C) 2018 Elsevier Ltd. All rights reserved.