You should look into the headTitle
view helper. You can put this snippet below in your bootstrap file (from the documentation at http://framework.zend.com/manual/en/zend.view.helpers.html#zend.view.helpers.initial.headtitle).
// setting the controller and action name as title segments:
$request = Zend_Controller_Front::getInstance()->getRequest();
$this->headTitle($request->getActionName())
->headTitle($request->getControllerName());
// setting the site in the title; possibly in the layout script:
$this->headTitle('Test Project');
// setting a separator string for segments:
$this->headTitle()->setSeparator(' / ');
Then you can set each page title individually in controller like this:
$this->view->headTitle('The page name')
The rendered title will look like this:
<title>Test Project / The page name</title>
Oh, and you need this in your layout script where the tag would go:
<?php echo $this->headTitle() ?>