How to remove display title on page

Do you mean Site Title by “title”? If so, then this should work:

#site-title {
     display: none;
}

Add this code to Theme Options – Other – Custom CSS. It will hide titles from all pages but will leave them in place for all Posts.

.page .entry-title {
    display: none;
}

it works perfectly
thanks !

Edit :/
there is a problem with using this method…
When you are using searching method. the title no longuer appear when pages are returned. So the user can’t click on the page.
Do you think it’s possible to change page.php to remove the automatic title display fonction instead ?
thanks

Then replace previously mentioned code with this one:

.page .entry-title {
    display: none;
}
.search .page .entry-title {
    display: block;
}