How to change page.html.twig depending on the content type I am viewing in Drupal 8?
Page title is available as a block, and you can control the visibility from there.

However, to answer your question, here's how to provide different template suggestions based on content type:

function YOUR_THEME_theme_suggestions_page_alter(array &amp;$suggestions, array $variables, $hook) {
  // Try to get the node, so we can check if we're on the node page.
  $node = Drupal::request()-&gt;attributes-&gt;get('node');
  if ($node &amp;&amp; $node-&gt;getType() == 'YOUR_CONTENT_TYPE') {
    $suggestions[] = 'page__NAME_OF_YOUR_TEMPLATE';
  }
}


This will allow you to use page--NAME-OF-YOUR-TEMPLATE.html.twig template in your theme only for specific content types.

You can read more about hook_theme_suggestions_HOOK_alter() here.