EVERYDAY MATERIALSAtlas
Process theme / simplified industrial explanation

Giving material a shape

Casting, rolling, drawing, extrusion and moulding create different shapes by different routes. A material must be suited to the chosen process. Shaping can also change its internal structure and direction-dependent behaviour, rather than merely changing its outline.

What changes?

Rolling makes sheet, drawing can make wire or fibre, and extrusion makes a continuous profile. Moulding and casting take a cavity’s shape. Actual products may combine several operations, followed by machining or finishing. Wall thickness, curves and joints then influence how loads and heat move.

What the diagram leaves out

A shape achievable in one material may be difficult in another. Thin walls, abrupt changes of section and process defects can affect durability. Comparing two materials at identical dimensions may therefore miss the practical design choices each permits.

What to look for next

Ask what the shape accomplishes: stiffness, flexibility, surface area, lightness, a seal, or a route for heat.

Follow a real material.

Aluminium

Light enough to carry. Adaptable enough to shape.

Metals

Copper

A quiet network of heat and electricity.

Metals

Carbon steel

Strength built from chemistry and structure.

Metals

Stainless steel

A protective surface that renews itself.

Metals

Cast iron

A heavy pan with a cast-in shape.

Metals

Silicon

The carefully controlled crystal inside electronics.

Elements & minerals

Soda-lime glass

The familiar glass of bottles and windows.

Glass & ceramics

Borosilicate glass

Glass designed to move less with heat.

Glass & ceramics

Aluminosilicate glass

A carefully engineered surface for a pocket-sized screen.

Glass & ceramics

Alumina

An electrical insulator that can also carry heat.

Glass & ceramics

Titanium

Strength and corrosion resistance without steel’s density.

Metals

PET

A clear bottle and a fleece share a polymer.

Polymers

Follow the evidence

Original explanations informed by the sources below. Technical and industry sources support material behaviour; industry environmental marketing is not treated as a universal comparison. Browse the source register.