Creating a 12-word seed on a hardware wallet that defaults to 24 words (eg titan 2.0)

By default, many hardware wallets create 24 word seeds. The private key entropy is 128 bits and therefore 12 words are sufficient security. 12 words are also easier to memorize compared to 24 words. The only advantage of 24 words is that if you can verify them reordered for example on trezor. However, if you already have a 12 word seed, you can recover it on most hardware wallets including ellipal.

I wouldn't use the reordered seed word features anyway because I do not want even a single word from my seed touching any computer. I also think memorizing the key adds to safety. You can still split your seed phrase into 4 different pieces and hide them in 4 different places. what is "elite dwarf energy" written on a piece of paper in my bank locker? well its 1/4 of my seed. If someone sees it, they may not even know wtf it is. I would only need to access them if I forget my seed plus I forgot my passphrase or lost my h/w wallet.

The way to create a new 12-word-seed is simple: get a dice and a coin and follow instructions here:

https://github.com/taelfrinn/Bip39-diceware

This should give you 12 words, the problem is that the last word has checksum bits that need to be correct. You can try 16 sequential words and one of them should fit. If you have an air-gapped computer, you can get the last word using this:

https://github.com/bharathrao/bip39check

To memorize your 12 word seed, say the first 4 words the first day, every hour; the first 8 words the next day and the full seed on the 3rd day. Verify every week. You will never forget it.

Good luck.