Do Alu Frames Creak?

I've been cycling on old 531 steel for 30 years plus, moved to a new alu bike in Jan and from day one it has made creaking/clicking noises most times I use it. I've put 500 miles a month on it. It's a 2011 Cube Streamer.
Some days worse than others. Most apparent with climbing out of the saddle but not solely. Click click click or creak click creak (you get the idea) in time with each crank revolution. Happens in all the triple chainrings and all rear sprockets. Sometimes intermittent, sometimes fairly constant, always quiet when not under real pedalling load.
So my (excellent) LBS has been through it all. So far he's removed/refitted/relubricated/retorqued cranks, bottom bracket, chainrings, pedals, full drivetrain, made sure all cable ends are tucked away, I've swapped pedals, changed shoes/saddle/seatpost, pedalled one footed with either foot. The new handbuilt wheels have been retightened and double checked. There's nothing we haven't tried as far as I know.
It's been a censored in the recent warm weather (far more creaking, less clicking!) so I'm starting to think it's just an aluminium thing?
Enlightenment appreciated!
Some days worse than others. Most apparent with climbing out of the saddle but not solely. Click click click or creak click creak (you get the idea) in time with each crank revolution. Happens in all the triple chainrings and all rear sprockets. Sometimes intermittent, sometimes fairly constant, always quiet when not under real pedalling load.
So my (excellent) LBS has been through it all. So far he's removed/refitted/relubricated/retorqued cranks, bottom bracket, chainrings, pedals, full drivetrain, made sure all cable ends are tucked away, I've swapped pedals, changed shoes/saddle/seatpost, pedalled one footed with either foot. The new handbuilt wheels have been retightened and double checked. There's nothing we haven't tried as far as I know.
It's been a censored in the recent warm weather (far more creaking, less clicking!) so I'm starting to think it's just an aluminium thing?
Enlightenment appreciated!
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My carbon fibre nice bike creaks a bit too, I worry about that for about 100 yards and then forget about it.
I suppose I just don't want the frustration of endlessly chasing down a creak.
Conversely I have 1972 knees and they do creak so go figure
I had very similar symptoms on my alu framed bike. Creaking that was worse when out of the saddle/putting pressure through the pedals.
Went through a similar exercise, including changing bottom bracket, cleaning and replacing seatpost, checking pedals and dismantling/reassembling the stem/handlebars etc.
On taking out the (integrated) headset (for the second time) I greased it everywhere...bearings inside and out, wedges, frame where it sits in place, inside of spacers and outside of steerer tube, underneath top cap...
Not sure which bit of greasing did the job but it's now nice and quiet.
Just go to sort out the 'tinkling' zip on my saddle bag and the occasional rattle from my frame pump :?
I think though that with the roads in the state they are it's inevitable that something will start to rattle at some point.
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Kinesis Pro 5 cross bike
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