My site has these two meta tags which currently have the same value:
<meta name="title" content="My Title" />
<meta property="og:title" name="title" content="My Title" />
The second one is a format required for facebook connectivity.
Does this mean the first one is redundant and can be removed?
I have been able to find no official reference which describes the first tag: <meta name="title" content="My Title" />. In practice, it seems to be of no use and if it ever was of use, I suspect it was just a lazy parser in a web crawler.
The second tag is of use. The OpenGraph standard is used for sharing by many sites other than Facebook. While it won't help search rankings directly, it may help indirectly by way of more attractive, better-formatted shares.
I'd suggest using more OpenGraph tags than just the og:title. Others, including og:image will help make better shares.