Abstract
The dislocation arrangement of a commercial pure Ti deformed by rolling and annealed was examined using a transmission electron microscope, and the hardness change associated with annealing after cold rolling was also measured. The results obtained may be summarized as follows:
(1) In the specimen as cold rolled, cusp-shape dislocations and loops were frequently observed. U-shape dislocations could be found, though few in number. This fact gives evidence to Price’s suggestion that the loops be formed by a cross glide process.
(2) By annealing below about 420°C, the hardness was scarcely changed, but a noticeable change was observed in the dislocation arrangement.
(3) In the temperature range from 420° to 520°C an abrupt decrease in hardness was observed, but only a slight change took place in the dislocation arrangement.
