EVERYDAY MATERIALSAtlas
Material behaviour

Strength & stiffness

Carry a load. Keep a shape.

What it means

Strength is resistance to failure under a specified load. Stiffness is resistance to elastic deformation: how much a part bends or stretches before the load is removed. They are different. A component can be stiff but brittle, or flexible and difficult to break. Geometry, temperature, defects and loading direction all change the result.

Look for it in everyday life.

Bicycle frames use tube shape and joint design as well as alloy or fibre choice.

Meet it in a material.

Carbon steel

Strength built from chemistry and structure.

Metals

Stainless steel

A protective surface that renews itself.

Metals

Aluminosilicate glass

A carefully engineered surface for a pocket-sized screen.

Glass & ceramics

Titanium

Strength and corrosion resistance without steel’s density.

Metals

PET

A clear bottle and a fleece share a polymer.

Polymers

HDPE

A tougher bottle from more orderly chains.

Polymers

PVC

One polymer, from rigid frames to flexible cable jackets.

Polymers

ABS

A tough shell around a more delicate machine.

Polymers

Polycarbonate

A clear view with more impact tolerance.

Polymers

Nylon

One family can become a bristle or a gear.

Polymers

Polyester fibre

Bottle chemistry, textile structure.

Polymers

Natural rubber

Tree latex becomes a resilient engineered material.

Natural materials

Cotton

A seed fibre turned into everyday fabric.

Natural materials

Wood

Structure grown in directions, not poured into a mould.

Natural materials

Paper & paperboard

A network of fibres becomes a sheet, box or carton.

Natural materials

Carbon-fibre composite

Strength follows the direction of the fibres.

Composites

Glass-fibre composite

Brittle glass becomes useful reinforcement.

Composites

Epoxy resin

The binder that makes separate parts act together.

Polymers

Brass

Copper and zinc, tuned for a useful shape.

Metals

Bronze

An alloy name with several branches.

Metals

Polyacetal (POM)

Small moving parts that keep their geometry.

Polymers

Flax / linen

A stem’s supporting fibres become linen.

Natural materials

Silk

A cocoon filament becomes a textile.

Natural materials

Leather

A biological fibre network, stabilised for use.

Natural materials

Bamboo

A grass stem becomes a useful structure.

Natural materials

Plywood

Thin layers share the work in different directions.

Composites

Concrete

Stone grains held by a reacting binder.

Composites

Cement

A reactive powder that binds a composite.

Glass & ceramics

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. Read our editorial method.