To disable it using the menu item settings, you need to assign an article to the menu item. Now it is not assigned and is inherited from the Category List Menu Item setup. If you disable it there, the headlines will also disappear in the list of articles. And I understand that using the binding of each article to the menu item is a lot of handmade and not convenient.
Therefore, the best solution in this situation is do not attempt to disable the joomla article title, but delete it from SP Page Builder. Moreover, the joomla article title has a micro-data, which is much better for SEO than the title inside Page Builder. If you use it inside the Page Builder only because of the stylization option, simply configure the joomla article title using CSS instead.
.view-article .page-header h1 {
font-size: 60px;
font-weight: 900;
color: #202020;
letter-spacing: 5px;
text-transform: uppercase;
padding: 50px 0 0 50px;
}
