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Heat-treated steel wire holds twisted shapes without springing open on bread bags. The figure is taken from Encyclopaedia Britannica, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

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Everyday twist ties use annealed soft steel wire inside paper sheaths

Heat-treated steel wire holds twisted shapes without springing open on bread bags

Everyday twist ties used to secure bread bags and cable cords consist of a narrow strip of annealed steel wire encased between paper or plastic strips. Annealing alters the wire's crystal structure so it bends easily and holds its twisted shape without springing back.

Twist-ties photograph — Evan-Amos · Public domain · source

Where this comes from

Encyclopaedia Britannica

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Tags: packaging, wire, fasteners

Everyday twist ties use annealed soft steel wire inside paper sheaths: the short answers

Where does this come from, and can I check it?: Heat-treated steel wire holds twisted shapes without springing open on bread bags. The figure is taken from Encyclopaedia Britannica, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a everyday life fact?: Yes. It sits on the Everyday Life shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.