Tag::getTitle() retunr empty string

Why my code doesn't work? Controller:

use Phalcon\Tag;

class TicketsController extends ControllerBase
{
    public function initialize()
    {
         $this->view->setTemplateBefore('public');
         Tag::setTitle('Билеты');
    }

    public function indexAction()
    {

    }

    public function eventIdAction()
    {
        Tag::appendTitle(' на событие');

    }

}

in action view I want get current title:

 <?php
    var_dump(Phalcon\Tag::getTitle());
   ?>

and get this: string(28) " " string is empty but size 28 characters