Turn on the autocomplete tag in WordPress post title. http://wordpress.stackexchange.com/q/175585/17305

autocomplete-on

<?php
/**
 * Plugin Name: Autocomplete Title
 * Description: Sets the autocomplete attribute to true on WordPress post titles
 * Plugin URI: http://wordpress.stackexchange.com/q/175585/17305
 */

namespace WPSE\AutocompleteTitle;

/**
 * Sets autocomplete attribute to true on WordPress post titles
 */
function set_autocomplete_on_title() {
	echo '<script>
	jQuery(document).ready(function($){
		if( $("#title").length ){
			$("#title").removeAttr("autocomplete");
		}
	});
	</script>';
}
\add_action( 'admin_footer', __NAMESPACE__ . '\\set_autocomplete_on_title' );