Atualizar title usando JSF 2 e AJX / Render page title using jsf 2 and AJAX

<h:form id="titleForm">
     <title>#{loginMB.title}</title>
</h:form>

<a4j:poll interval="60000" render="titleForm" status="ajaxStatus">
     <f:setPropertyActionListener value="LpcSys (#{bean.baixasPendentes})" target="#{loginMB.title}"/>
</a4j:poll>

Fonte: http://stackoverflow.com/questions/11153010/updating-title-text-in-javaserver-faces-2-primefaces-3-3-1