Google typically displays the first 50-60 characters of a title tag, or as many characters as will fit into a 512-pixel display. If you keep your titles under 55 characters, you can expect at least 95% of your titles to display.
Based on Google SERPs, title tag and meta description character limits have decreased 21% and 23%, respectively. Now it is 55 characters (including spaces) for title tags and 115 characters (including spaces) for meta descriptions