Since regular expression can often be more of an art than a science, I will try my flavoring of this, try the following, this would only remove the title tag itself, but not the actual title text between the <title> and </title>
$value =~ s/<(title|\/title)([^>]|\n)*>//g;
To be honest, parts of this reg-ex are a bit mysterious to me, so I would have to research them a bit to make sure I knew what they were doing, basically, what I THINK its doing is finding all items that happen to be between tag elements < and > and then it also looks ahead for a closing > just in case someone did something like >> at the end of a tag. It also looks for any line breaks in the tag, and allows for those as well. Adding the title or /title at the beginning SHOULD check for just those tags.
Hope this helps,
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Fred Hirsch
Web Consultant & Programmer