What headline has your documentation item ? You can use more than one headline level in your title. Each level is marked with a <h0> - <h9>-Tag (similar to HTML). Your title has to start with a <h0>-Tag and then following the lesser levels. Example:
<title> <h0>Hardware</h0> <h1>Disks</h1> <h2>Mounted Filesystems</h2> </title>