I can't answer if it's easy or not, depends what is easy for you.
There is no "title" supplied by this mod- perhaps you mean the description?
It's created in the plugin
Pin Button in Posts
It's commented in the code where it does this.
But this is the snippet...
Code:
//Get Description
if ($vbulletin->options['bop5pin_desc'] == 0)
$boppin['desc'] = trim(urlencode(trim($vbulletin->options['description'])));
elseif ($vbulletin->options['bop5pin_desc'] == 1)
$boppin['desc'] = trim(urlencode($thread['title']));
else // ($vbulletin->options['bop5pin_desc'] == 2)
$boppin['desc'] = trim(urlencode(strip_tags(trim($post['message']))));
You can erase all that and just set
$boppin['desc'] = to whatever you want. If you can figure out how to get what you want in that plugin.