Rods and wire of an alloy of titanium with: - a uniform solid cross-section in the form of a cylinder, - with a diameter of 0,8 mm or more, but not more than 5 mm, - an aluminium content by weight of 0,3 % or more, but not more than 0,7 %, - a silicon content by weight of 0,3 % or more, but not more than 0,6 %, - a niobium content by weight of 0,1 or more, but not more than 0,3 %, and - an iron content by weight of not more than 0,2 %