Left-hand side plots show the [Fe/Ti] versus [Ti/H] abundance trends when using the kinematical criteria as defined in Bensby et al. (2003, 2005). Stars have been colour- and size-coded depending on their ages. Right-hand side plots shows the abundance trends when splitting the sample according to their ages (as indicated). For all plots we have only included stars whose ages have been better determined than 4 Gyr (difference between upper and lower age estimates).