Here is a sample of elaborate titles that "really" happen in the wild -- these are taken from the Proceedings of the ICM 2018:
title = {{$\bold Z$-theory: chasing ${\mathfrak m}/f$ theory}},
title = {New examples of complete Calabi--Yau metrics on $\mathbb{C}^n$ for $n\ge 3$},
title = {Uniqueness of the group measure space decomposition for {P}opa's {$\mathscr{HT}$} factors},
title = {Actions of {$\mathbb F_\infty$} whose {${\rm II}_1$} factors and orbit equivalence relations have prescribed fundamental group},
title = {Cocycle and orbit superrigidity for lattices in {${\rm SL}(n,\mathbb R)$} acting on homogeneous spaces},
title = {Profinite rigidity of $\mathbf{PGL}(2,{\Z}[\omega])$ and $\mathbf{PSL}(2,{\Z}[\omega])$},
title = {Representation of measures with polynomial denseness in {$L_p(\mathbb R,d\mu)$}, {$0<p<\infty$}, and its application to determinate moment problems},
title = {Zimmer's conjecture for actions of $\mathrm{SL}(m,\mathbb{Z})$},
title = {Can lattices in {${\rm SL}(n,\mathbb R)$} act on the circle?},
title = {Higher {T}eichm\"uller spaces: from {${\rm SL}(2,\mathbb R)$} to other {L}ie groups},
title = {Exponential decay of connection probabilities for subcritical Voronoi percolation in $\mathbb{R}^d$},
title = {A {KAM} scheme for {${\rm SL}(2,\mathbb R)$} cocycles with {L}iouvillean frequencies},
title = {On dynamics of {$Out(F_n)$} on {$\mathrm{PSL}_2({\mathbb C})$} characters},
title = {General topology meets model theory, on {$\mathfrak p$} and {$\mathfrak t$}},^M
title = {New classes of {${\mathcal L}\sp{p}$}-spaces},
title = {A class of special {${\mathcal L}\sb{\infty }$}\ spaces},
title = {More {$\ell_r$} saturated {$\mathscr L^\infty$} spaces},
title = {The {${\mathcal L}\sb{p}$} spaces},
title = {A remark on bases in {${\mathcal L}\sb{p}$}-spaces with an application to complementably universal {${\mathcal L}\sb{\infty }$}-spaces},
title = {{${\rm SL}(2,\mathbb C)$} {C}hern-{S}imons theory and the asymptotic behavior of the colored {J}ones polynomial},
title = {K-polystability of {${\mathbb Q}$}-{F}ano varieties admitting {K}\"ahler-{E}instein metrics},
title = {Weak geodesic rays in the space of {K}\"ahler potentials and the class {$\mathcal{E}(X,\omega)$}},
title = {Operator-algebraic superridigity for {${\rm SL}_n(\mathbb Z)$}, {$n\geq 3$}},
title = {The space of closed subgroups of {$\mathbb R^n$} is stratified and simply connected},
title = {The irreducible representations of the {L}ie algebra {${\mathfrak s}{\mathfrak l}(2)$}\ and of the {W}eyl algebra},
title = {Singular {G}elfand-{T}setlin modules of {${\mathfrak{gl}}(n)$}},
title = {Families of irreducible singular Gelfand-Tsetlin modules of $\mathfrak{gl}(n)$},
title = {Infinite-dimensional representations of the {L}ie algebra {$\mathfrak{gl}(n,{\mathbb C})$} related to complex analogs of the {G}elfand-{T}setlin patterns and general hypergeometric functions on the {L}ie group {${\rm GL}(n,{\mathbb C})$}},
title = {A geometric approach to 1-singular {G}elfand--{T}setlin {$\mathfrak{gl}_n$}-modules},
title = {Geometric approach to $p$-singular Gelfand--Tsetlin $\mathfrak {gl}_n$-modules},
title = {On some {B}ruhat decomposition and the structure of the {H}ecke rings of {${\mathfrak p}$}-adic {C}hevalley groups},
title = {Stable $s$-minimal cones in $\mathbb{R}^3$ are flat for $s\sim 1$},
title = {Delaunay type domains for an overdetermined elliptic problem in {$\mathbb S^n\times\mathbb R$} and {$\Bbb H^n\times\Bbb R$}},
title = {A {KAM} scheme for {${\rm SL}(2,\mathbb R)$} cocycles with {L}iouvillean frequencies},