how to change page title in wordpress

Im trying to change the_title() for my wordpress website page, however it changes all the text and I only what to change 'ORDER' to 'QUOTE' and leave the order number '#3344'. Could anyone help me with my if statement. THANKS

<?php
// Changeing Order title to quote
    $page_id = get_the_ID();
if($page_id == '49')
    {
        $original_title = get_the_title();
        $new_title = str_replace("ORDER","QUOTE","ORDER");
    echo $new_title;
 }
    else {
        the_title();
        }
?>