Titanium/titanium-oxide electrode has been prepared and used as indicator electrode in potentiometric acid-base and oxidation-reduction titration in aqueous solutions. The E-pH curve is linear with slope of 0.055V at 298.15K. This value is more or less closed to the theoretical value 2.303RT/2F (0.059 V at 298.15). The standard potential of this electrode, E^o, is computed as 242.1 mV with respect to the SCE as reference electrode. Three acids: acetic, propanoic and phosphoric acids were potentiometrically titrated with NaOH as titrants in aqueous medium at 298.15 K using the Ti/TiO₂ electrode. Also ammonium ferrous sulphate was potentiometrically titrated with KMnO4 as titrant in the same conditions.

Keywords: titanium/titanium oxide electrode, potentiometric titration, acid-base titration, oxidation-reduction titration.