I’ve faced the same problem as this thread (https://appfinite.com/topic/removing-page-titles-without-removing-post-titles/) and gave me a place to look at.
The two pages have their own class ‘type-page’ for pages and ‘type-blog’ for blog posts. Rather than modifying the css entry named ‘.page .entry-title’ is a finer, more focused styling to do what was intended.
.type-page .entry-title {
display: none;
}
Just posted here in order to provide a more refined answer hoping that will help someone looking to do this.