default value of title block set to controller name in cakePHP?

In a cakephp layout I fetch a block in order to set the title of the page like so

<title>Example - <?php echo $this->fetch('title');?></title>

I have noticed that unless I create a block 'title' in a view or assign some value to the block, the value of title always corresponds to the name of the controller. I have not found this behaviour documented anywhere. Is there any way to change this? My cakePHP version is 2.7.5.