Will Google penalize me if I use the part of my keyword trice in the title? For example, if I am targeting HTC Support, I might write a title...

No Google not penalize for rewriting keyword again and again in title, but its better that you use three keywords in one title this will be more helpful. Like instead of this "HTC Support - Ask Tech Support and Solve Your Problem Now" you can use
HTC Supports - Ask Tech Support and Solve Your HTC Problem Now

Three keywords in it, HTC Supports, HTC Support, and HTC Problem.

Thanks
Kamran

Great question Matthew. Because it's no longer 2005, Google is paying less attention to technical SEO signals and more attention to user behavior and page popularity (internal and external).

Your title is awesome because it invokes "title tag principles" (Google that), including a call-to-action, keyword theme and a value proposition.

Provided your meta description doesn't repeat the same phrases (you can easily say the same thing differently), but also includes reasons to convince a searcher to click on your listing, you've set yourself up for excellent CTR in the search results. It also won't hurt to have your keywords at the front of the URL. Example: site.com/awesome-htc-support/.

Keyword repetition is something we try to avoid specifically in explicit instances or when we non-intentionally stuff keywords. Example of a bad title: HTC Support - Top HTC Support, HTC Support Experts, HTC Support Consultants. You can, however, use these phrases in subheadings (h2), again, non-explicitly, and within backlinks to the page from blog posts and 3rd party websites. Google can do the math.

Your title is perfect - don't change a thing.

I like your answer Kamran, but don't you think HTC Problem deserves it's own page? Example: site.com/htc-problems/ where we might optimize for different types of problems? Just a thought.

My experience has been that each page deserves it's own keyword theme, where semantic variations with lower search volume can enhance the page via subheadings/subtopics and through link building systems.

But I definitely agree about the singular/plural benefits, where it makes sense (HTC Supports isn't a term I've ever heard of). :)

Sure. You use it. I think Google will not penalize. If your title is keyword, then i think it's a extra support for site ranking.

Thank you.

HTC Supports is just an example, main point is that its difficult to produce content as HTC Help, HTC Problem, HTC Support page content will be almost same, so why not produce good content for one page this will help other keywords also. 65 characters are allowed for title tag, if we use only one keyword its mean that we not utilizing title tag fully, and also just targeting one keyword will be consider as keyword stuffing.