Bare with me. I will explain what changes Google has made followed by how Google decides how to make the SERP link and what specifically happened in your case.
Google has been changing the look and feel of the SERPs since March 2014 with the hopes of improving the user experience and click-through rates (CTR). It is believed that changing the SERP look and feel along with the various options Google decided to implement improves search results and benefits the sites that appear in the SERPs. Google has made several changes, but has settled on the ones that appear to be most effective.
Part of the changes include changing the font size of the SERP link. Prior to the change, the SERP link would have be taken directly from the page
title tag with a character limit of 55 characters. This would mean that any title greater than 55 characters in length could have an ellipsis (...) added to the end to indicate that the title was truncated. For a period the ellipsis was dropped and then returned.
Now the title length limit is measured in 512 pixels and not characters. Letters that are wider such as G, K, and W significantly reduce the number of characters that appear in the SERP link. Today, the SERP link can be 45 to 50 characters generally, and possibly as long as 55 characters.
When Google sees a long
title tag it may choose to use:
- What appears to be a brand name which can be the domain name with or
without the TLD. (most likely)
- What it knows to be a brand name. (fairly likely)
- The first header
h1 tag. (very likely)
- A portion of the content that closely matches the search query.
- Information from a publicly available source such as ODP DMOZ (not
- Information from rich snippets mark-up. (less likely)
- Text from anchors text. (less likely)
Also note that these options apply if the
title tag is missing or empty. As well, if a
title tag is short, Google will likely chose to brand your SERP link with your domain name with TLD.
In your case, it appears that because your
title tag is longer than the prescribed limit (89 characters), Google decided to take the first option in the list using your domain name as a brand name without the TLD.
To avoid this, manage your
title tag length and use the
Google Webmaster Tools -> Fetch as Google tool to test how a change would appear in the SERPs.