[mulmen]

So does metal. Welding is just melting two parts together.

[baq]

https://en.wikipedia.org/wiki/Cold_welding

[mulmen]

https://en.m.wikipedia.org/wiki/Welding

What point are you trying to make here?

[baq]

no heat, no melting. just welding

[HPsquared]

Perhaps it would have been better to say "melting two parts together is just welding".

[imtringued]

We can do this with glass, however, lapping is incredibly expensive for something as simple as joining two pieces of glass together.