Code snippet that can be used to pass custom variable to views-view.html.twig in Drupal 8.
/**
* Implements hook_preprocess_HOOK() for views templates.
*/
function mytheme_preprocess_views_view(&$variables)
{
$view = $variables['view'];
$variables['views_title'] = ['#markup' => $view->getTitle()];
}
To print title in views-view.html.twig juste use {{ views_title }}
