The evaporation process of titanium in a U. H. V. system (10-9 Torr) is investigated in details. Electron diffraction and electron microscopic studies are made on the structure and epitaxial growth of titanium films deposited on heated cleaved faces of rock salt and mica. The epitaxial relations (0001)Ti_??_(001)NaCI and (3034)Ti_??_(001)NaCI are observed on the films evaporated in U. H. V. The titanium films evaporated in high vacuum (10-5 Torr) changed to titanium carbide in a few minutes.