Google Changing Title Tags
Based on the above charts, we can assume that Google is making changes to titles when they display the SERPs. I wanted to find out just how many have been changed and how different they are from the on page title. 36% of titles were partially changed where the title displayed in Google was extracted from the on page title or they were the on page title with something minor appended to it such as the site name. 25.4% of the titles were completely changed where there were different words or a different word order in the SERPs than in the on page titles.
Title Tag Differences
Partial Change - 36%
Complete Change - 25.4%
Unchanged - 38.6%
For those titles that were left unchanged, their lengths match up pretty well with the overall combined lengths noted above. The largest range is still between 50 and 59 characters.