How do I find the code executed when wp_head() is called?

by

since you want to edit title attribute.

  • goto functions.php and search wp_title, on line 277 you find add_filter('wp_title', 'suffusion_modify_title', 10, 3);
  • search for callback fx suffusion_modify_title in /suffusion/functions/filters.php, on line 664 you find suffusion_modify_title fx which i think
    handle titles.