Following a conversation at work about a tantalum-tungsten alloy, and how it’s difficult to say it, I’ve invented a new tongue-twister. Here it is:

Tanned Alan tongues ten tungsten-tantalum tonnes to learn stung Stan’s turnstone’s tin-taloned.

The structure is four blocks, which are meant to be roughly homophonic with:

tantalum-tungsten tungsten-tantalum tantalum-tungsten tungsten-tantalum

That, in itself, would be a simple but effective tongue-twister (like red lorry yellow lorry). But I’ve elaborated on it by replacing three of the four blocks with similar sounding elements:

Other suggestions for tantalum-tungsten tongue twisters are welcome in the comments.