For robustness, you should probably look into Text::Balanced. For quick and dirty, which means putting more limits on what you will accept (no nesting or line breaks, for example), this might get you there: 
m/<blank\s+title\s*=\s*(["'])?(.*?)$1\s*>/

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Update: As noted in the reply below, the $1 should be a \1.

In reply to Re: Regex and a pseudo-XML tag by Roy Johnson
in thread Regex and a pseudo-XML tag by inblosam

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