The Drupal 7 Account pages (user, user/register, user/password), all have the same Title, i.e. "User Account". I just ran up against this issue and my client wanted different / custom titles on these pages. It turns out there is an issue filed against core. For now the issue is for Drupal 8 and will probably be backported for Drupal 7 eventually once the fix for Drupal 8 is committed.
In the meantime, I searched around drupal.org for a fix and ended up with a nice template preprocess function that was implemented for Adaptive Theme. It seems pretty elegant and is very flexible in that you can customize your own titles for these pages in your own theme.
In your theme's template.php file, add this code as a page preprocess function. Note that "my_theme" should be the machine name of your theme. I have also accounted for the fact that user and user/login are two urls but actually the same page. I have also added a check to see whether or no the user is logged in or not for added flexibility.
- Drupal Backport policy
- Fix page title for user/register, user/password, user/login pages, currently all the same
- Overriding of user log in page titles