title-shortcode.php

<?php
/**
 * Plugin Name:  Title shortcode
 * Description:  Turns support for shortcodes placed in post/page title
 * Version:      1.0
 * Author:       ziemekpr0
 * Author Email: ziemekpr0@gmail.com
 * Author URI:   http://wpadmin.pl
 * License:      GPLv2 or later
 */

/* Security check - block direct access */
if (!defined('ABSPATH')) exit('No direct script access allowed');

function wpa_filter_title( $title, $id ) {
	return do_shortcode($title);
}

add_filter( 'the_title', 'wpa_filter_title', 10, 2 );