All search engine has their own algorithm for all the factors which is necessary to show your result in SERP. Same manner all has the different limitations for meta title tag as follow:
Google.com : Title length should be 50- 60 character & description length 150-160 characters. Yahoo.com : Title length should be 60-72 character & description length 155-165 characters. Bing.com : Title length should be 65 character & description length 155 characters. Ask.com : Title length should be 70 character & description length 312 characters.