If/else statement for specific WordPress page title

You can determine whether the blog is displayed using is_home():

<?php
if ( is_home() ) {
    echo 'Blog';
}
else {
    the_title();
}
?>

Be aware that the the_title() function only displays the title of the current post. If you’re on any other kind of page, such as the blog, a category archive, a date archive, or search results; the post title is probably not what you want to display in that context. You will want to use some of the many available conditional tags to determine what you’re currently viewing, so that you can determine what title to display.

If you look at the template hierarchy you can get an idea of what kinds of pages WordPress will query. The conditional tags will help you find out where in that hierarchy you are.