To uninstall xtitle just follow these instructions.
sudo apt-get remove xtitle
This will remove just the xtitle package itself.
sudo apt-get remove --auto-remove xtitle
This will remove the xtitle package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for xtitle then this will work.
sudo apt-get purge xtitle
Or similarly, like this xtitle
sudo apt-get purge --auto-remove xtitle
|Maintainer||Jari Aalto <firstname.lastname@example.org>|
|Description||set window title and icon name for X terminal window in which it is run to be its command line arguments. It does this by outputting the appropriate xterm(1) control sequence charac characters. Unless messages are suppressed, xtitle will also report the settings it has made.|