Hi,
Very simple systems can be developed :)
open sources/Subs.php
edit line 1002 and 1013
line 1002 alt="{alt}" replace;
alt="'.$context['page_title_html_safe'].'" title="'.$context['page_title_html_safe'].'"
line 1013 alt="" replace;
alt="'.$context['page_title_html_safe'].'" title="'.$context['page_title_html_safe'].'"
Topic Title are added automatically "alt" and "title" tag
You shouldn't do this. It doesn't add any contextual information about the image and might cause your site to get negative ratings by search engines. Just add alt/title tags to your images.