According to the study conducted by Moz, Google’s display titles max out (currently) at 600 pixels: https://moz.com/learn/seo/title-tag
I believe on page seo and technical seo is the two main factors of ranking.
If you want to see what Google will show for your article, use a tool like Google SERP Simulator https://www.serpure.com or the WordPress Yoast https://yoast.com to preview them and keep them under the limit.
Thanks
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