Shortcode to show post title truncated

functions.php

<?php 
/**
 *
 * Shortcode to show post title truncated
 * 
 * [posttitle]
 *
 */
function ns_post_title_shortcode(){
	return wp_trim_words( get_the_title(), 10 );	
}
add_shortcode( 'posttitle', 'ns_post_title_shortcode' );