How to hide title of any content type without using a module?
You could do it in template.php in your theme dir, technically not a module.

e.g:

/**
 * Implements hook_preprocess_node
 */
function MYTHEME_preprocess_node(&amp;$variables){
  if ($variables['node']-&gt;type == 'article') {
    $variables['title'] = FALSE;
  }
}


Replace "MYTHEME" with your theme name and clear all caches at Admin &gt; Config &gt; Performance to apply.