WP Conditional page Title Update

conditional_page_title.php

<?php 

// probably in functions.php ....

add_filter('wp_title', 'thisdomain_news_archive_title');
function thisdomain_news_archive_title($title) {
    //check if its a blog post
    if (!is_single())
        return $title;

    //if you get here then its a blog post so change the title
    global $wp_query;
    if (isset($wp_query->post->post_title)){
       // update here to what you need
        return $wp_query->post->post_title;
    }

    //if wordpress can't find the title return the default
    return $title;
}