The electrochemical behavior of titaniumhas been investigated in chloride electrolyte of different pH values (2.1, 5.2 and 7.4). Potentiodynamic polarization studies showed wide passive behavior irrespective of change in pH. Passive films were grown by applying different passive potentials (0.2 to 0.6 V (vs SCE)) by recording chronoamperometric curves for duration of 8 h. Electrochemical impedance spectroscopy (EIS) measurements showed higher impedance values for the oxide layer grown in neutral pH condition and for oxides formed at higher formation potentials. Emphasis is made mainly on the properties of titanium oxide estimated by Mott-Schottky analysis, which shows that passive film formed, is of n-Type semiconducting film and the donor concentration is in the order of 1020 cm-3. The calculated diffusivity of point defects is in the range of (0.5 to 2.5) × 1016 cm2s-1 and tends to decrease with increase in electrolyte pH. Surface morphology of the passive filmswas examined using scanning electronmicroscope and surface roughnesswas characterized using confocal microscope. Ex-situ ellipsometry measurements were performed to analyze the optical constants of the oxide layer and to determine the oxide thickness. The thickness is in the range of 3.5 to 5.8 nm and comparable to the calculated values. © 2015 Elsevier B.V. All rights reserved.