Titanium (Ti) exhibits excellent corrosion resistance in most aqueous media due to the formation of a stable oxide film and is chosen for surgical and odontological implants for this resistance and its biocompatibility. Treatment with fluorides (F) is the main method to prevent plaque formation and dental caries. Toothpastes, mouthwashes and prophylactic gels can contain from 200 to 20,000 ppm F and have neutral to acidic character, which can affect the corrosion behavior of titanium devices present in the oral cavity. In this work the behavior of Ti has been evaluated in artificial saliva of pH 2, 5 and 7 and different fluoride concentrations (0, 1,000, 5,000 and 10,000 ppm F), through open-circuit potential measurements, potentiodynamic polarization and electrochemical impedance spectroscopy. Limits of pH value and fluoride concentration at which Ti corrosion behavior changed could be established. Active behavior was observed for pH 2 and 1,000-10,000 ppm F, and for pH 5 and 5,000 and 10,000 ppm F. The other conditions led to passive behavior. Decrease in corrosion resistance and less tendency for passivation were observed as fluoride concentration increased and pH decreased.