Abstract
Titanium is a metallic biomaterial used for a long period of time. The current interest is focused on β titanium alloys; molybdenum is one of the elements that close the ? region effectively. The objective of this work was to prepare titanium-molybdenum experimental alloys and to describe their corrosion properties in environments interesting from application in dentistry point of view.
The measurements were done using Ti grade 2, Ti15Mo and Ti30Mo alloys. Corrosion properties were studied in the physiological solution at three pH levels and fluoride ions content up to 5000 ppm. Measurements were done by standard electrochemical techniques.
Corrosion properties of the studied alloys were at higher pH values comparable with the properties of titanium. Decrease of pH and presence of fluorides resulted in the case of titanium in pronounced decrease of corrosion resistance. The change was not so sharp for alloys, alloying resulted in improvement of corrosion behaviour.

Key words
titanium, molybdenum, titanium β alloys, fluorides, corrosion

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