A WordPress filter to avoid widows in your titles

gistfile1.php

<?php
/**
 * A WordPress filter to avoid widows in your titles
 */
function avoid_title_widows( $title ) {
	// Find the last space.
	$last_space = strrpos($title, ' ');

	// Replace it with a non-breaking space.
	if ( $last_space ) {
		$title = substr($title, 0, $last_space) . '&nbsp;' . substr($title, $last_space + 1);
	}

	return $title;
}
add_filter('the_title', 'avoid_title_widows');