Historically, I think it was stone.

Dear Fatemehzahra Pishgar

As far as I can remember carbon steels were the first used material for the cutting tools.

Heat, iron chisel and hammer on stone to cut , give shape and strength by eliminating stresses

Hunan Teeth for small things

Animal bones for medium things

Stone for large and hard things

This is what I am thinking 🤔

My dear professor Mehdi Shahedi Asl

Thanks for your reply.

Dear Kourosh Vaferi

So many thanks for answering me.

Dear Satish Narula

thanks for your attention.

Mr. Nafees Mohammad

Thanks for your reply.

Dear Fatemeh

I do agree with dr.shahedi.

it was stone as i searched for the answer.

My dear professor Dr. Mohammad Vajdi

Thanks for your kindness.

My professor, I think, I should explain more about the question. I don't mean the earliest cutting tools. As you you, nowadays, the material of the cutting tools are changing and scholars search for the best material. Now, my question is what was the first selected material for cutting tools. Is it stone?

Welcome Fatemehzahra Pishgar . Your question was interesting and insightful.

Dear Fatemehzahra Pishgar ,

I think I got your question.

It is WC, tungsten carbide or cemented carbide.

In the 1920s, a German scientist, Dr. Schroter, invented “cemented carbide” a new cutting tool material that was much harder than high-speed steel.

So many many thanks my dear professor Dr. Mehdi Shahedi Asl .

Dear Fatemehzahra

Sintered tungsten carbide - cobalt cutting tools are very abrasion resistant and can also withstand higher temperatures than standard high-speed steel (HSS) tools.

You can see Application & Properties of "WC" in link:

Kurlov, Alexey S.; Gusev, Aleksandr I. (2013). Tungsten Carbides: Structure, Properties and Application in Hardmetals. Springer Science & Business Media. doi:10.1007/978-3-319-00524-9. ISBN 978-3-319-00524-9. LCCN 2013942113.

Dear Elmira Ghazanfari Jajin

Thank you very much.🙏

1. Carbon steels have been used since the 1880s for cutting tools.

2. High Speed Steel (HSS) tools are so named because they were developed to cut at higher speeds. Developed around 1900 HSS are the most highly alloyed tool steels.

3. Cast Cobalt Alloys Introduced in early 1900s these alloys have compositions of about 40 - 55% cobalt, 30% chromium and 10 - 20% tungsten and are not heat treatable.

Dr. Nafees Mohammad

Thank you very much.

Dear fatemeh

In 1898 high speed steel (HSS) was used as material for cutting tools.

For more information check the following link.

http://mmc-permanent.learnways.com/courses/91/history-of-cutting-tools.html

Dear Fatemehzahra Pishgar

Dear sanam, thank you so much.

Dear sahar, that was great. Thank you.⚘

Dear Fatemehzahra Pishgar

According to the book of Cutting Tool Technology (Smith, 2007), the first used material for cutting tools is plain carbon steels in which employed in the late 1870s.

Early humans, by breaking rocks and bones, made chips of stone with sharp edges that would be used as knives.

In ancient history, stones used for separating objects through highly directed force. After that, the human used copper. I have read the following:

"Ever since those early days of cutting tools made of stone, the concept of cutting has remained the same—separating objects through highly directed force. Two related ideas have also remained true—the material the cutting tool is made from must be harder than the material it is cutting and stress at the contact point between the tool and the material must increase until the material breaks at that point of contact."

Kindly, you can click the link below to find a complete, new, and full answer:

https://www.qualitymag.com/articles/96391-a-cutting-history-of-accuracy