What intention should one make when performing Tayammum?
For Tayammum to be valid it is a condition that one makes the intention of an action which is worship in itself and which cannot be performed without purification.
And Allah ﷻ knows the best
Imam Ahmad Rida Khan رحمة الله تعالى عليه
Translation by Dr Musharraf Hussain Al-Azhari Translator of Majestic Quran, www.majesticquran.co.uk