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Google states on their support page: _If we’ve detected that a particular result has [...] issues with its title, we may try to generate an improved title from anchors, on-page text, or other sources. However, sometimes even pages with well-formulated, concise, descriptive titles will end up with different titles in our search results to better indicate their relevance to the query. _ There’s a simple reason for this: the title tag as specified by a webmaster is limited to being static, fixed regardless of the query. Once we know the user’s query, we can often find alternative text from a page that better explains why that result is relevant. Using this alternative text as a title helps the user, and it also can help your site. Users are scanning for their query terms or other signs of relevance in the results, and a title that is tailored for the query can increase the chances that they will click through. What to do? Here's the answer: make your title mean something as a sentence or a phrase. List of keywords is not descriptive of what is on the page. Therefore Google will not use that. There are exceptions for e-commerce or product sites but that is the rule. If you want to highlight a certain keyword — simply place that at the start of the said phrase in the title. try to think as an user searching for your page when composing the above mentioned phrase. What do they desire? For more, please see my previous answer at http://moz.com/community/q/title-tag-issue-2