Here are two tips to avoid having Google truncate your post titles with the dreaded ellipsis:

  1. Show the Post Title First — The default WordPress theme shows the name of the blog before the title of the post. Reordering your title tag puts the text more relevant to the searcher’s query (the post title) first. Plus it’s better for SEO, since your post title keywords are given more prominence.
  2. Keep Your Titles Short — Once you have your post titles at the beginning, you should avoid truncation by keeping the titles under 64 characters or so if possible.