Some Words Are Showing In Google Search Console After Title

Dear Team ,

I Did Not Know What Is Happening With Rank Math Because To Many Issues Are There One Word Is Adding With My Title But I Did Not Put That Word In My Post I did Not Know Why Its Happing Can You Please Suggest Me What Should I Do For This

URL : https://steeltube.co.in/ms-pipe-weight-chart-in-kg/

You Can See Above URL I Only Put ( ms pipe weight chart in kg – weight of ms pipe ) In My Post Title But As You Can See In Google Its Showing ( ms pipe weight chart in kg – Stainless Steel Pipes ) I Did Not Know Why